Attachment 6o - CPC Staff Report - May 21, 2026 — Riverside City Council, July 14, 2026 (part 1 of 2)

GSI Job No. 4790

TABLE OF CONTENTS
Tables

2015 Results: AMEC Foster Wheeler, 2015, Additional Phase II Environmental Site Assessment Report, Riverside Scrap Iron & Metal Site, Riverside, California, December 9.

PCB-1016 PCB-1221 PCB-1232 PCB-1242 PCB-1248 PCB-1254 PCB-1260 27,000 720 720 970 940 970 990
6,600 170 170 230 230 240 240
NS1 8e 8/10/2015 0.25 ND<20 ND<20 ND<20 ND<20 ND<20 94 57 8/18/2015 0.25 ND<20 ND<20 ND<20 8,600 ND<20 28,000 2300J 8/18/2015 1 ND<20UJ ND<20UJ ND<20UJ 62,000J ND<20UJ 290,000J 34,000J 8/18/2015 2.5 ND<20 ND<20 ND<20 ND<20 ND<20 23 ND<20
NS3 8f 8/10/2015 0.25 ND<20 ND<20 ND<20 ND<20 ND<20 47 43 NS4 8e 8/10/2015 2.5 ND<20 ND<20 ND<20 ND<20 ND<20 130 33 NS5 8f 8/10/2015 2.5 ND<20 ND<20 ND<20 ND<20 ND<20 ND<20 ND<20 NS6 8e 8/10/2015 2.5 ND<20 ND<20 ND<20 ND<20 ND<20 ND<20 ND<20 NS7 8a 8/21/2015 2.5 ND<20 ND<20 ND<20 55 ND<20 110 58
8/21/2015 0.25 ND<20UJ ND<20UJ ND<20UJ 2,200J ND<20UJ 350J 110J 8/21/2015 2.5 ND<20 ND<20 ND<20 ND<20 ND<20 ND<20 ND<20 NS9 8a 8/11/2015 2.5 ND<20 ND<20 ND<20 ND<20 ND<20 ND<20 ND<20 NS10A 8c 8/21/2015 0.25 ND<20UJ ND<20UJ ND<20UJ 110J ND<20UJ 200J 100J NS11 10b 8/11/2015 2.5 ND<20 ND<20 ND<20 ND<20 ND<20 39 27 NS12 10b 8/13/2015 2.5 ND<20 ND<20 ND<20 ND<20 ND<20 ND<20 ND<20 NS13 10b 8/13/2015 2.5 ND<20 ND<20 ND<20 71 ND<20 76 32 NS14 8c 8/14/2015 2.5 ND<20 ND<20 ND<20 ND<20 ND<20 ND<20 ND<20 8/14/2015 0.25 ND<20 ND<20 ND<20 1,500 ND<20 1,600 290
8/14/2015 2.5 ND<20 ND<20 ND<20 ND<20 ND<20 ND<20 ND<20 NS16 12 8/13/2015 2.5 ND<20 ND<20 ND<20 ND<20 ND<20 ND<20 ND<20 NS17 8h 8/21/2015 2.5 ND<20 ND<20 ND<20 ND<20 ND<20 ND<20 ND<20 8/21/2015 0.25 ND<20UJ ND<20UJ ND<20UJ 250J ND<20UJ 420J 150J 8/21/2015 2.5 ND<20 ND<20 ND<20 ND<20 ND<20 ND<20 ND<20 NS15 8c
NS18 8h
Industrial RSL (ug/kg)
Residential RSL (ug/kg)
NS2 8d
NS8 8a
TABLE 1

SUMMARY OF POLYCHLORINATED BIPHENYLS (PCBS) IN SHALLOW SOIL Riverside Scrap Iron & Metal Site
Riverside, California
Concentrations reported in micrograms per kilogram (µg/kg) Sample/
Boring
ID
Area Sample
Date
depth
(feet bgs)
EPA Method 8082 (µg/kg)
P:\10468.000.0\10468.004.0\Docs\Additional Phase II ESA Report\Tables\Tables Amec Foster Wheeler

Page 1 of 6 ends

PCB-1016 PCB-1221 PCB-1232 PCB-1242 PCB-1248 PCB-1254 PCB-1260 27,000 720 720 970 940 970 990
6,600 170 170 230 230 240 240
Industrial RSL (ug/kg)
Residential RSL (ug/kg)
TABLE 1

SUMMARY OF POLYCHLORINATED BIPHENYLS (PCBS) IN SHALLOW SOIL Riverside Scrap Iron & Metal Site
Riverside, California
Concentrations reported in micrograms per kilogram (µg/kg) Sample/
Boring
ID
Area Sample
Date
depth
(feet bgs)
EPA Method 8082 (µg/kg)
NS19 8h 8/21/2015 2.5 ND<20 ND<20 ND<20 ND<20 ND<20 ND<20 ND<20 8/21/2015 2.5 ND<20UJ ND<20UJ ND<20UJ 3,200J ND<20UJ 1,500J 1,100J 8/21/2015 5 ND<20UJ ND<20UJ ND<20UJ 1,100J ND<20UJ 480J 290J NS21 8h 8/21/2015 2.5 ND<20 ND<20 ND<20 ND<20 ND<20 ND<20 ND<20 8/10/2015 0.25 ND<20 ND<20 ND<20 ND<20 ND<20 24 21
8/10/2015 2.5 ND<20UJ ND<20UJ ND<20UJ ND<20UJ ND<20UJ ND<20UJ ND<20UJ 8/18/2015 0.25 ND<20UJ ND<20UJ ND<20UJ ND<20UJ ND<20UJ 1,300J 140J 8/18/2015 1 ND<20 ND<20 ND<20 ND<20 ND<20 42 ND<20
8/12/2015 0.25 ND<20UJ ND<20UJ ND<20UJ 320J ND<20UJ 12,000J 1,600J 8/12/2015 1 ND<20 ND<20 ND<20 ND<20 ND<20 ND<20 ND<20
NS27 8d 8/12/2015 0.25 ND<20 ND<20 ND<20 ND<20 ND<20 120 97 8/12/2015 0.25 ND<20UJ ND<20UJ ND<20UJ 2,000J ND<20UJ 860J 180J 8/12/2015 1 ND<20 ND<20 ND<20 ND<20 ND<20 ND<20 ND<20
NS29 8d 8/12/2015 0.25 ND<20UJ ND<20UJ ND<20UJ 58J ND<20UJ 110J 89J NS30 8d 8/21/2015 0.25 ND<20UJ ND<20UJ ND<20UJ ND<20UJ ND<20UJ 44J 45J 8/11/2015 0.25 ND<20 ND<20 ND<20 ND<20 ND<20 ND<20 ND<20 8/11/2015 2.5 ND<20 ND<20 ND<20 ND<20 ND<20 ND<20 ND<20 8/12/2015 0.25 ND<20 ND<20 ND<20 ND<20 ND<20 51 ND<20
8/12/2015 2.5 ND<20 ND<20 ND<20 ND<20 ND<20 ND<20 ND<20 8/11/2015 0.25 ND<20 ND<20 ND<20 ND<20 ND<20 76 47
8/11/2015 2.5 ND<20 ND<20 ND<20 ND<20 ND<20 ND<20 ND<20 8/18/2015 0.25 ND<20 ND<20 ND<20 140 ND<20 940 71
8/18/2015 2.5 ND<20 ND<20 ND<20 ND<20 ND<20 ND<20 ND<20 S3 8f
S4 8d
NS28 8d
S1 8e
S2 8e
NS24 8e
NS25 8d
NS26 8d
NS20 8h
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PCB-1016 PCB-1221 PCB-1232 PCB-1242 PCB-1248 PCB-1254 PCB-1260 27,000 720 720 970 940 970 990
6,600 170 170 230 230 240 240
Industrial RSL (ug/kg)
Residential RSL (ug/kg)
TABLE 1

SUMMARY OF POLYCHLORINATED BIPHENYLS (PCBS) IN SHALLOW SOIL Riverside Scrap Iron & Metal Site
Riverside, California
Concentrations reported in micrograms per kilogram (µg/kg) Sample/
Boring
ID
Area Sample
Date
depth
(feet bgs)
EPA Method 8082 (µg/kg)
8/12/2015 0.25 ND<20 ND<20 ND<20 ND<20 ND<20 170 93
8/12/2015 2.5 ND<20 ND<20 ND<20 ND<20 ND<20 ND<20 ND<20 S6 8d 8/12/2015 0.25 ND<20UJ ND<20UJ ND<20UJ 19,000J ND<20UJ 51,000J 6,100J S7 12 8/11/2015 2.5 ND<20 ND<20 ND<20 ND<20 ND<20 ND<20 ND<20 S8 8a 8/13/2015 2.5 ND<200 ND<200 ND<200 ND<200 ND<200 ND<200 ND<200 S9 8a 8/12/2015 0.25 ND<20UJ ND<20UJ ND<20UJ 120J ND<20UJ 280J 130J 8/11/2017 0.25 ND<20UJ ND<20UJ ND<20UJ 1,400J ND<20UJ 4,300J 3,500J 8/11/2015 2.5 ND<20 ND<20 ND<20 ND<20 ND<20 ND<20 ND<20 8/13/2015 0.25 ND<200 ND<200 ND<200 1,600 ND<200 1,400 430 8/13/2015 1 ND<200 ND<200 ND<200 ND<200 ND<200 ND<200 ND<200 8/13/2015 2.5 ND<20 ND<20 ND<20 ND<20 ND<20 ND<20 ND<20 S12 8a 8/12/2015 0.25 ND<20 ND<20 ND<20 ND<20 ND<20 ND<20 ND<20 S13 8a 8/14/2015 0.25 ND<20 ND<20 ND<20 4,200 ND<20 1,600 300 8/13/2015 0.25 ND<20UJ ND<20UJ ND<20UJ 2,900J ND<20UJ 15,000J 9,300J 8/13/2015 1 ND<200 ND<200 ND<200 48,000J ND<200 50,000J 18,000J 8/13/2015 2.5 ND<20 ND<20 ND<20 ND<20 ND<20 38 ND<20
8/12/2015 0.25 ND<20UJ ND<20UJ ND<20UJ 230J ND<20UJ 95J 23J 8/12/2015 2.5 ND<20 ND<20 ND<20 ND<20 ND<20 ND<20 ND<20 S16 8b 8/14/2015 2.5 ND<20 ND<20 ND<20 ND<20 ND<20 ND<20 ND<20 S17 8g 8/14/2015 0.25 ND<20 ND<20 ND<20 26 ND<20 60 30
S18 8h 8/14/2015 2.5 ND<20 ND<20 ND<20 ND<20 ND<20 ND<20 ND<20 8/14/2015 0.25 ND<20 ND<20 ND<20 ND<20 ND<20 ND<20 ND<20 8/14/2015 2.5 ND<20 ND<20 ND<20 ND<20 ND<20 ND<20 ND<20 8/19/2015 0.25 ND<200 ND<200 ND<200 ND<200 ND<200 ND<200 ND<200 8/19/2015 2.5 ND<20 ND<20 ND<20 ND<20 ND<20 ND<20 ND<20 8/14/2015 0.25 ND<20UJ ND<20UJ ND<20UJ ND<20UJ ND<20UJ ND<20UJ 22J 8/14/2015 2.5 ND<20 ND<20 ND<20 ND<20 ND<20 ND<20 ND<20ES2 8b S15 10b
S19 8g
ES1 10a
S10 12
S11 8a
S14 10b
S5 8d
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PCB-1016 PCB-1221 PCB-1232 PCB-1242 PCB-1248 PCB-1254 PCB-1260 27,000 720 720 970 940 970 990
6,600 170 170 230 230 240 240
Industrial RSL (ug/kg)
Residential RSL (ug/kg)
TABLE 1

SUMMARY OF POLYCHLORINATED BIPHENYLS (PCBS) IN SHALLOW SOIL Riverside Scrap Iron & Metal Site
Riverside, California
Concentrations reported in micrograms per kilogram (µg/kg) Sample/
Boring
ID
Area Sample
Date
depth
(feet bgs)
EPA Method 8082 (µg/kg)
ES3 8h 8/14/2015 0.25 ND<20 ND<20 ND<20 200 ND<20 410 170 A8a-SB1 8a 1/27/2011 1 ND<50 ND<100 ND<50 ND<50 ND<50 199 ND<50 A8a-SB2 8a 1/27/2011 1 ND<50 ND<100 ND<50 ND<50 ND<50 790 ND<50 A8a-SB3 8a 1/27/2011 1 ND<50 ND<100 ND<50 ND<50 2,960 2,660 ND<50 A8a-SB4 8a 1/27/2011 1 ND<50 ND<100 ND<50 ND<50 ND<50 ND<50 ND<50 A8a-SB5 8a 1/27/2011 1 ND<50 ND<100 ND<50 ND<50 8,150 4,620 ND<50 A8a-SB6 8a 1/27/2011 1 ND<50 ND<100 ND<50 ND<50 26,800 5,950 ND<50 A8b-SB1 8b 1/27/2011 1 ND<50 ND<100 ND<50 ND<50 369,000 125,000 ND<50 A8b-SB2 8b 1/28/2011 1 ND<50 ND<100 ND<50 ND<50 ND<50 ND<50 ND<50 A8b-SB3 8b 1/28/2011 1 ND<50 ND<100 ND<50 ND<50 180 274 ND<50 A8b-SB4 8b 1/28/2011 1 ND<50 ND<100 ND<50 ND<50 ND<50 903 ND<50 A8c-SB1 8c 1/27/2011 1 ND<50 ND<100 ND<50 ND<50 ND<50 ND<50 ND<50 A8c-SB2 8c 1/27/2011 1 ND<50 ND<100 ND<50 ND<50 10,400 1,450 ND<50 A8c-SB3 8c 1/27/2011 1 ND<50 ND<100 ND<50 ND<50 24,300 2,670 ND<50 A8c-SB4 8c 1/27/2011 1 ND<50 ND<100 ND<50 ND<50 ND<50 ND<50 ND<50 A8d-SB1 8d 1/26/2011 1 ND<50 ND<100 ND<50 ND<50 ND<50 ND<50 ND<50 A8d-SB2 8d 1/26/2011 1 ND<50 ND<100 ND<50 ND<50 ND<50 5,840 ND<50 A8d-SB3 8d 1/26/2011 1 ND<50 ND<100 ND<50 ND<50 ND<50 903 ND<50 A8d-SB4 8d 1/26/2011 1 ND<50 ND<100 ND<50 ND<50 ND<50 372 ND<50 A8e-SB1 8e 1/25/2011 1 ND<50 ND<100 ND<50 ND<50 ND<50 219 ND<50 A8e-SB2 8e 1/25/2011 1 ND<50 ND<100 ND<50 ND<50 ND<50 109 ND<50 A8e-SB3 8e 1/25/2011 1 ND<50 ND<100 ND<50 ND<50 ND<50 ND<50 ND<50 A8e-SB4 8e 1/25/2011 1 ND<50 ND<100 ND<50 ND<50 ND<50 ND<50 62,800 A8e-SB5 8e 1/26/2011 1 ND<50 ND<100 ND<50 ND<50 ND<50 ND<50 ND<50 A8e-SB6 8e 1/26/2011 1 ND<50 ND<100 ND<50 ND<50 ND<50 1,430 ND<50 A8e-SB7 8e 1/26/2011 1 ND<50 ND<100 ND<50 ND<50 ND<50 ND<50 ND<50 P:\10468.000.0\10468.004.0\Docs\Additional Phase II ESA Report\Tables\Tables Amec Foster Wheeler

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PCB-1016 PCB-1221 PCB-1232 PCB-1242 PCB-1248 PCB-1254 PCB-1260 27,000 720 720 970 940 970 990
6,600 170 170 230 230 240 240
Industrial RSL (ug/kg)
Residential RSL (ug/kg)
TABLE 1

SUMMARY OF POLYCHLORINATED BIPHENYLS (PCBS) IN SHALLOW SOIL Riverside Scrap Iron & Metal Site
Riverside, California
Concentrations reported in micrograms per kilogram (µg/kg) Sample/
Boring
ID
Area Sample
Date
depth
(feet bgs)
EPA Method 8082 (µg/kg)
A8e-SB8 8e 1/26/2011 1 ND<50 ND<100 ND<50 ND<50 ND<50 ND<50 ND<50 A8f-SB1 8f 1/25/2011 1 ND<50 ND<100 ND<50 ND<50 ND<50 ND<50 ND<50 A8f-SB2 8f 1/25/2011 1 ND<50 ND<100 ND<50 ND<50 ND<50 161 ND<50 A8f-SB3 8f 1/25/2011 1 ND<50 ND<100 ND<50 ND<50 ND<50 3,070 ND<50 A8g-SB1 8g 1/26/2011 1 ND<50 ND<100 ND<50 ND<50 ND<50 ND<50 ND<50 A8g-SB2 8g 1/26/2011 1 ND<50 ND<100 ND<50 ND<50 ND<50 ND<50 ND<50 A8g-SB3 8g 1/26/2011 1 ND<50 ND<100 ND<50 ND<50 ND<50 ND<50 ND<50 A8h-SB1 8h 1/28/2011 1 ND<50 ND<100 ND<50 ND<50 ND<50 ND<50 ND<50 A8h-SB10 8h 1/28/2011 1 ND<50 ND<100 ND<50 ND<50 ND<50 ND<50 ND<50 A8h-SB2 8h 1/28/2011 1 ND<50 ND<100 ND<50 ND<50 ND<50 1,300 ND<50 A8h-SB3 8h 1/28/2011 1 ND<50 ND<100 ND<50 ND<50 1,180 699 ND<50 A8h-SB4 8h 1/28/2011 1 ND<50 ND<100 ND<50 ND<50 1,570 552 ND<50 A8h-SB5 8h 1/28/2011 1 ND<50 ND<100 ND<50 ND<50 ND<50 ND<50 ND<50 A8h-SB6 8h 1/28/2011 1 ND<50 ND<100 ND<50 ND<50 84 ND<50 ND<50 A8h-SB7 8h 1/28/2011 1 ND<50 ND<100 ND<50 ND<50 1,730 1,810 ND<50 A8h-SB8 8h 1/28/2011 1 ND<50 ND<100 ND<50 ND<50 1,490 536 ND<50 A8h-SB9 8h 1/28/2011 1 ND<50 ND<100 ND<50 ND<50 ND<50 ND<50 ND<50 A10a-SB1 10a 1/28/2011 1 ND<50 ND<100 ND<50 ND<50 ND<50 ND<50 ND<50 A10a-SB2 10a 1/28/2011 1 ND<50 ND<100 ND<50 ND<50 ND<50 ND<50 ND<50 A10b-SB1 10b 1/26/2011 1 ND<50 ND<100 ND<50 ND<50 ND<50 112 ND<50 A10b-SB2 10b 1/26/2011 1 ND<50 ND<100 ND<50 ND<50 2,190 1,290 ND<50 A10b-SB3 10b 1/26/2011 1 ND<50 ND<100 ND<50 ND<50 ND<50 7,120 ND<50 A10b-SB4 10b 1/26/2011 1 ND<50 ND<100 ND<50 ND<50 ND<50 ND<50 73,800 A12-SB1 12 1/31/2011 1 ND<50 ND<100 ND<50 ND<50 ND<50 ND<50 23,000 A12-SB2 12 1/31/2011 1 ND<50 ND<100 ND<50 ND<50 ND<50 ND<50 ND<50 A12-SB3 12 1/31/2011 1 ND<50 ND<100 ND<50 ND<50 123 ND<50 ND<50 A12-SB4 12 1/31/2011 1 ND<50 ND<100 ND<50 ND<50 205 120 ND<50 P:\10468.000.0\10468.004.0\Docs\Additional Phase II ESA Report\Tables\Tables Amec Foster Wheeler

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PCB-1016 PCB-1221 PCB-1232 PCB-1242 PCB-1248 PCB-1254 PCB-1260 27,000 720 720 970 940 970 990
6,600 170 170 230 230 240 240
Industrial RSL (ug/kg)
Residential RSL (ug/kg)
TABLE 1

Soil samples collected in 2011 at 0.5 to 1 foot bgs by Ami Adini & Associates (2011) shown for completeness.

J = The analyte was positively identified and the associated numerical value is the approximate concentration of the analyte in the sample due either to the quality of the data generated because certain quality control criteria were not met or the sample was analyzed outside the holding time. See data quality review memo for details.

UJ = The analyte was not detected above the laboratory reporting limit but the reporting limit is approximate due either to the quality of the data generated because certain quality control criteria were not met or the sample was analyzed outside the holding time for extraction. See data quality review memo for details.

Abbreviations
bgs = Below ground surface
ND = Not detected at the reporting limit shown
PCBs = Polychlorinated biphenyls
RSL = Regional soil screening level
USEPA = United States Environmental Protection Agency
µg/kg = Micrograms per kilogram
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Page 6 of 6 ends

GSI Job No. 4790

TABLE OF CONTENTS
Tables

2017 Results: Hillmann Consulting, 2017, Off -Site Preliminary Environmental Assessment, Riverside Scrap Iron & Metal, Riverside, California, February 27.

2017 Results: Hillmann, 2017, Draft Remedial Action Plan, Riverside Scrap Iron & Metal, Riverside, California, May 8.

TABLE 2
Summary of PCB Soil Sampling Results (EPA)
Boring ID Area Date Depth (ft) PCB 1016 PCB 1221 PCB 1232 PCB 1242 PCB 1248 PCB 1254 PCB 1260 Total PCB S1-0.25
S1-1
2981
Mssn Inn
Feb 2017 0.25
1 ND<0.05
ND<0.05
ND<0.05
ND<0.05
ND<0.05
ND<0.05
ND<0.05
ND<0.05
ND<0.05
ND<0.05
ND<0.05
ND<0.05
ND<0.05
ND<0.05
ND<0.05
ND<0.05
S2-0.25
S2-1
2981
Mssn Inn
Feb 2017 0.25
1 ND<0.05
ND<0.05
ND<0.05
ND<0.05
ND<0.05
ND<0.05
ND<0.05
ND<0.05
ND<0.05
ND<0.05
ND<0.05
ND<0.05
ND<0.05
ND<0.05
ND<0.05
ND<0.05
S3-0.25
S3-1
2981
Mssn Inn
Feb 2017 0.25
1 ND<0.05
ND<0.05
ND<0.05
ND<0.05
ND<0.05
ND<0.05
ND<0.05
ND<0.05
ND<0.05
ND<0.05
ND<0.05
ND<0.05
ND<0.05
ND<0.05
ND<0.05
ND<0.05
S4-0.25
S4-1
2981
Mssn Inn
Feb 2017 0.25
1 ND<0.05
ND<0.05
ND<0.05
ND<0.05
ND<0.05
ND<0.05
ND<0.05
ND<0.05
ND<0.05
ND<0.05
ND<0.05
ND<0.05
ND<0.05
ND<0.05
ND<0.05
ND<0.05
S5-0.25
S5-1
2981
Mssn Inn
Feb 2017 0.25
1 ND<0.05
ND<0.05
ND<0.05
ND<0.05
ND<0.05
ND<0.05
ND<0.05
ND<0.05
ND<0.05
ND<0.05
ND<0.05
ND<0.05
ND<0.05
ND<0.05
ND<0.05
ND<0.05
S6-0.25
S6-1
2981
Mssn Inn
Feb 2017 0.25
1 ND<0.05
ND<0.05
ND<0.05
ND<0.05
ND<0.05
ND<0.05
ND<0.05
ND<0.05
ND<0.05
ND<0.05
ND<0.05
ND<0.05
ND<0.05
ND<0.05
ND<0.05
ND<0.05
S7-0.25
S7-1
2981
Mssn Inn
Feb 2017 0.25
1 ND<0.05
ND<0.05
ND<0.05
ND<0.05
ND<0.05
ND<0.05
ND<0.05
ND<0.05
ND<0.05
ND<0.05
ND<0.05
ND<0.05
ND<0.05
ND<0.05
ND<0.05
ND<0.05
S8-0.25
S8-1
2981
Mssn Inn
Feb 2017 0.25
1 ND<0.05
ND<0.05
ND<0.05
ND<0.05
ND<0.05
ND<0.05
ND<0.05
ND<0.05
ND<0.05
ND<0.05
ND<0.05
ND<0.05
ND<0.05
ND<0.05
ND<0.05
ND<0.05
S9-0.25
S9-1
2968 6th
St
Feb 2017 0.25
1 ND<0.05
ND<0.05
ND<0.05
ND<0.05
ND<0.05
ND<0.05
ND<0.05
ND<0.05
ND<0.05
ND<0.05
ND<0.05
ND<0.05
ND<0.05
ND<0.05
ND<0.05
ND<0.05
S10-0.25
S10-1
2968 6th
St
Feb 2017 0.25
1 ND<0.05
ND<0.05
ND<0.05
ND<0.05
ND<0.05
ND<0.05
ND<0.05
ND<0.05
ND<0.05
ND<0.05
ND<0.05
ND<0.05
ND<0.05
ND<0.05
ND<0.05
ND<0.05
S11-0.25
S11-1
2968 6th
St
Feb 2017 0.25
1 ND<0.05
ND<0.05
ND<0.05
ND<0.05
ND<0.05
ND<0.05
ND<0.05
ND<0.05
ND<0.05
ND<0.05
ND<0.05
ND<0.05
ND<0.05
ND<0.05
ND<0.05
ND<0.05
S12-0.25
S12-1
2968 6th
St
Feb 2017 0.25
1 ND<0.05
ND<0.05
ND<0.05
ND<0.05
ND<0.05
ND<0.05
ND<0.05
ND<0.05
ND<0.05
ND<0.05
ND<0.05
ND<0.05
ND<0.05
ND<0.05
ND<0.05
ND<0.05
S13-0.25
S13-1
2968 6th
St
Feb 2017 0.25
1 ND<0.05
ND<0.05
ND<0.05
ND<0.05
ND<0.05
ND<0.05
ND<0.05
ND<0.05
ND<0.05
ND<0.05
ND<0.05
ND<0.05
ND<0.05
ND<0.05
ND<0.05
ND<0.05
S14-0.25
S14-1
2968 6th
St
Feb 2017 0.25
1 ND<0.05
ND<0.05
ND<0.05
ND<0.05
ND<0.05
ND<0.05
ND<0.05
ND<0.05
ND<0.05
ND<0.05
ND<0.05
ND<0.05

0.05 ND<0.05

0.05 ND<0.05
S15-0.25
S15-1
2968 6th
St
Feb 2017 0.25
1 ND<0.05
ND<0.05
ND<0.05
ND<0.05
ND<0.05
ND<0.05
ND<0.05
ND<0.05
ND<0.05
ND<0.05
ND<0.05
ND<0.05

0.10 ND<0.05

0.10 ND<0.05
S16-0.25
S16-1
2968 6th
St
Feb 2017 0.25
1 ND<0.05
ND<0.05
ND<0.05
ND<0.05
ND<0.05
ND<0.05
ND<0.05
ND<0.05
ND<0.05
ND<0.05
ND<0.05
ND<0.05

0.07 ND<0.05

0.07 ND<0.05
S17-0.25
S17-1
2981 6th
St
Feb 2017 0.25
1 ND<0.05
ND<0.05
ND<0.05
ND<0.05
ND<0.05
ND<0.05
ND<0.05
ND<0.05
ND<0.05
ND<0.05
ND<0.05
ND<0.05
ND<0.05
ND<0.05
ND<0.05
ND<0.05
S18-0.25
S18-1
2981 6th
St
Feb 2017 0.25
1 ND<0.05
ND<0.05
ND<0.05
ND<0.05
ND<0.05
ND<0.05
ND<0.05
ND<0.05
ND<0.05
ND<0.05
ND<0.05
ND<0.05
ND<0.05
ND<0.05
ND<0.05
ND<0.05
S19-0.25
S19-1
2981 6th
St
Feb 2017 0.25
1 ND<0.05
ND<0.05
ND<0.05
ND<0.05
ND<0.05
ND<0.05
ND<0.05
ND<0.05
ND<0.05
ND<0.05
ND<0.05
ND<0.05

0.05 ND<0.05

0.05 ND<0.05
S20-0.25
S20-1
2981 6th
St
Feb 2017 0.25
1 0.14
ND<0.05
ND<0.05
ND<0.05
ND<0.05
ND<0.05
ND<0.05
ND<0.05
ND<0.05
ND<0.05
ND<0.05
ND<0.05

0.25 ND<0.05

0.39 ND<0.05
TABLE 2
Summary of PCB Soil Sampling Results (EPA)
Boring ID Area Date Depth (ft) PCB 1016 PCB 1221 PCB 1232 PCB 1242 PCB 1248 PCB 1254 PCB 1260 Total PCB S21-0.25
S21-1
2981 6th
St
Feb 2017 0.25
1 ND<0.05
ND<0.05
ND<0.05
ND<0.05
ND<0.05
ND<0.05
ND<0.05
ND<0.05
ND<0.05
ND<0.05
ND<0.05
ND<0.05
ND<0.05
ND<0.05
ND<0.05
ND<0.05
S22-0.25
S22-1
2981 6th
St
Feb 2017 0.25
1 ND<0.05
ND<0.05
ND<0.05
ND<0.05
ND<0.05
ND<0.05
ND<0.05
ND<0.05
ND<0.05
ND<0.05
ND<0.05
ND<0.05
ND<0.05
ND<0.05
ND<0.05
ND<0.05
S23-0.25
S23-1
2981 6th
St
Feb 2017 0.25
1 ND<0.05
ND<0.05
ND<0.05
ND<0.05
ND<0.05
ND<0.05
ND<0.05
ND<0.05
ND<0.05
ND<0.05
ND<0.05
ND<0.05
ND<0.05
ND<0.05
ND<0.05
ND<0.05
S24-0.25
S24-1
2981 6th
St
Feb 2017 0.25
1 ND<0.05
ND<0.05
ND<0.05
ND<0.05
ND<0.05
ND<0.05
ND<0.05
ND<0.05
ND<0.05
ND<0.05
ND<0.05
ND<0.05
ND<0.05
ND<0.05
ND<0.05
ND<0.05
S25-0.25
S25-1
Mssn Inn
Entry
Feb 2017 0.25
1 ND<0.05
ND<0.05
ND<0.05
ND<0.05
ND<0.05
ND<0.05
ND<0.05
ND<0.05
ND<0.05
ND<0.05
ND<0.05
ND<0.05
ND<0.05
ND<0.05
ND<0.05
ND<0.05
S26-0.25
S26-1
Mssn Inn
Entry
Feb 2017 0.25
1 ND<0.05
ND<0.05
ND<0.05
ND<0.05
ND<0.05
ND<0.05
ND<0.05
ND<0.05
ND<0.05
ND<0.05
ND<0.05
ND<0.05
ND<0.05
ND<0.05
ND<0.05
ND<0.05
S27-0.25
S27-1
Mssn Inn
Entry
Feb 2017 0.25
1 ND<0.05
ND<0.05
ND<0.05
ND<0.05
ND<0.05
ND<0.05
ND<0.05
ND<0.05
ND<0.05
ND<0.05
ND<0.05
ND<0.05

0.076
ND<0.05

0.076
ND<0.05
S28-0.25
S28-1
Mssn Inn
Entry
Feb 2017 0.25
1 ND<0.05
ND<0.05
ND<0.05
ND<0.05
ND<0.05
ND<0.05
ND<0.05
ND<0.05
ND<0.05
ND<0.05
ND<0.05
ND<0.05

0.097
ND<0.05

0.097
ND<0.05
S29-0.25
S29-1
5th St
Entry
Feb 2017 0.25
1 ND<0.05
ND<0.05
ND<0.05
ND<0.05
ND<0.05
ND<0.05
ND<0.05
ND<0.05
ND<0.05
ND<0.05
ND<0.05
ND<0.05

0.74 0.12

0.74 0.12
S30-0.25
No Sample
5th St
Entry
Feb 2017 0.25
--

0.39 --
ND<0.05
--
ND<0.05
--
ND<0.05
--
ND<0.05
--
ND<0.05
--

0.22 --

0.61 --
S31-0.25
S31-1
5th St
Entry
Feb 2017 0.25
1 0.31
ND<0.05
ND<0.05
ND<0.05
ND<0.05
ND<0.05
ND<0.05
ND<0.05
ND<0.05
ND<0.05
ND<0.05
ND<0.05

0.40 ND<0.05

0.71 ND<0.05
S32-0.25
S32-1
5th St
Entry
Feb 2017 0.25
1 ND<0.05
ND<0.05
ND<0.05
ND<0.05
ND<0.05
ND<0.05
ND<0.05
ND<0.05
ND<0.05
ND<0.05
ND<0.05
ND<0.05
ND<0.05
ND<0.05
ND<0.05
ND<0.05
S33-0.25
S33-1
5th St
Entry
Feb 2017 0.25
1 ND<0.05
ND<0.05
ND<0.05
ND<0.05
ND<0.05
ND<0.05
ND<0.05
ND<0.05
ND<0.05
ND<0.05
ND<0.05
ND<0.05
ND<0.05
ND<0.05
ND<0.05
ND<0.05
S34-0.25
S34-1
6th St
Entry
Feb 2017 0.25
1 ND<0.05
ND<0.05
ND<0.05
ND<0.05
ND<0.05
ND<0.05
ND<0.05
ND<0.05
ND<0.05
ND<0.05
ND<0.05
ND<0.05

1.05 0.067

1.05 0.067
S35-0.25
S35-1
6th St
Entry
Feb 2017 0.25
1 ND<0.05
ND<0.05
ND<0.05
ND<0.05
ND<0.05
ND<0.05
ND<0.05
ND<0.05
ND<0.05
ND<0.05
ND<0.05
ND<0.05

0.94 ND<0.05

0.94 ND<0.05
S36-0.25
S36-1
6th St
Entry
Feb 2017 0.25
1 ND<0.05
ND<0.05
ND<0.05
ND<0.05
ND<0.05
ND<0.05
ND<0.05
ND<0.05
ND<0.05
ND<0.05
ND<0.05
ND<0.05

0.061
ND<0.05

0.061
ND<0.05
S37-0.25
S37-1
6th St
Entry
Feb 2017 0.25
1 ND<0.05
ND<0.05
ND<0.05
ND<0.05
ND<0.05
ND<0.05
ND<0.05
ND<0.05
ND<0.05
ND<0.05
ND<0.05
ND<0.05

0.60 ND<0.05

0.60 ND<0.05
S38-0.25
S38-1
6th St
Entry
Feb 2017 0.25
1 0.059
ND<0.05
ND<0.05
ND<0.05
ND<0.05
ND<0.05
ND<0.05
ND<0.05
ND<0.05
ND<0.05
ND<0.05
ND<0.05

0.37 ND<0.05

0.429
ND<0.05
S39-0.25
S39-1
6th St
Entry
Feb 2017 0.25
1 ND<0.05
ND<0.05
ND<0.05
ND<0.05
ND<0.05
ND<0.05
ND<0.05
ND<0.05
ND<0.05
ND<0.05
ND<0.05
ND<0.05

0.13 ND<0.05

0.13 ND<0.05
S40-0.25
S40-1
6th St
Entry
Feb 2017 0.25
1 ND<0.05
ND<0.05
ND<0.05
ND<0.05
ND<0.05
ND<0.05
ND<0.05
ND<0.05
ND<0.05
ND<0.05
ND<0.05
ND<0.05

0.40 ND<0.05

0.40 ND<0.05
NS1 8e Aug 2015 0.25 ND<0.02 ND<0.02 ND<0.02 ND<0.02 ND<0.02 0.094 0.057 0.151 TABLE 2
Summary of PCB Soil Sampling Results (EPA)
Boring ID Area Date Depth (ft) PCB 1016 PCB 1221 PCB 1232 PCB 1242 PCB 1248 PCB 1254 PCB 1260 Total PCB NS2 8d Aug 2015 0.25
1 2.5
ND<0.02
ND<0.02
ND<0.02
ND<0.02
ND<0.02
ND<0.02
ND<0.02
ND<0.02
ND<0.02

8.6 62
ND<0.02
ND<0.02
ND<0.02
ND<0.02
28 290

0.023

2.3 34
ND<0.02

38.9 386

0.023
NS3 8f Aug 2015 0.25 ND<0.02 ND<0.02 ND<0.02 ND<0.02 ND<0.02 0.047 0.043 0.09 NS4 8e Aug 2015 2.5 ND<0.02 ND<0.02 ND<0.02 ND<0.02 ND<0.02 0.130 0.033 0.163 NS5 8f Aug 2015 2.5 ND<0.02 ND<0.02 ND<0.02 ND<0.02 ND<0.02 ND<0.02 ND<0.02 ND NS6 8e Aug 2015 2.5 ND<0.02 ND<0.02 ND<0.02 ND<0.02 ND<0.02 ND<0.02 ND<0.02 ND NS7 8a Aug 2015 2.5 ND<0.02 ND<0.02 ND<0.02 0.055 ND<0.02 0.11 0.058 0.223 NS8 8a Aug 2015 0.25

2.5 ND<0.02
ND<0.02
ND<0.02
ND<0.02
ND<0.02
ND<0.02

2.2 ND<0.02
ND<0.02
ND<0.02

0.35 ND<0.02

0.11 ND<0.02

2.66 ND
NS9 8a Aug 2015 2.5 ND<0.02 ND<0.02 ND<0.02 ND<0.02 ND<0.02 ND<0.02 ND<0.02 ND NS10A 8a Aug 2015 0.25 ND<0.02 ND<0.02 ND<0.02 0.11 ND<0.02 0.200 0.100 0.41 NS11 10b Aug 2015 2.5 ND<0.02 ND<0.02 ND<0.02 ND<0.02 ND<0.02 0.039 0.027 0.066 NS12 10b Aug 2015 2.5 ND<0.02 ND<0.02 ND<0.02 ND<0.02 ND<0.02 ND<0.02 ND<0.02 ND NS13 10b Aug 2015 2.5 ND<0.02 ND<0.02 ND<0.02 0.071 ND<0.02 0.076 0.032 0.179 NS14 8c Aug 2015 2.5 ND<0.02 ND<0.02 ND<0.02 ND<0.02 ND<0.02 ND<0.02 ND<0.02 ND NS15 8c Aug 2015 0.25

2.5 ND<0.02
ND<0.02
ND<0.02
ND<0.02
ND<0.02
ND<0.02

1.5 ND<0.02
ND<0.02
ND<0.02

1.6 ND<0.02

0.29 ND<0.02

3.39 ND
NS16 12 Aug 2015 2.5 ND<0.02 ND<0.02 ND<0.02 ND<0.02 ND<0.02 ND<0.02 ND<0.02 ND NS17 8h Aug 2015 2.5 ND<0.02 ND<0.02 ND<0.02 ND<0.02 ND<0.02 ND<0.02 ND<0.02 ND NS18 8h Aug 2015 0.25

2.5 ND<0.02
ND<0.02
ND<0.02
ND<0.02
ND<0.02
ND<0.02

0.25 ND<0.02
ND<0.02
ND<0.02

0.42 ND<0.02

0.15 ND<0.02

0.82 ND
NS19 8h Aug 2015 2.5 ND<0.02 ND<0.02 ND<0.02 ND<0.02 ND<0.02 ND<0.02 ND<0.02 ND NS20 8h Aug 2015 2.5
5 ND<0.02
ND<0.02
ND<0.02
ND<0.02
ND<0.02
ND<0.02

3.2 1.1
ND<0.02
ND<0.02

10.5 0.48

1.1 0.29

14.8 1.87
NS21 8h Aug 2015 2.5 ND<0.02 ND<0.02 ND<0.02 ND<0.02 ND<0.02 ND<0.02 ND<0.02 ND NS24 8e Aug 2015 0.25

2.5 ND<0.02
ND<0.02
ND<0.02
ND<0.02
ND<0.02
ND<0.02
ND<0.02
ND<0.02
ND<0.02
ND<0.02

0.024
ND<0.02

0.021
ND<0.02

0.045
ND
NS25 8d Aug 2015 0.25
1 ND<0.02
ND<0.02
ND<0.02
ND<0.02
ND<0.02
ND<0.02
ND<0.02
ND<0.02
ND<0.02
ND<0.02

1.3 0.042

0.14 ND<0.02

1.44 0.042
NS26 8d Aug 2015 0.25
1 ND<0.02
ND<0.02
ND<0.02
ND<0.02
ND<0.02
ND<0.02

0.32 ND<0.02
ND<0.02
ND<0.02
12 ND<0.02

1.6 ND<0.02

13.92 ND
NS27 8a Aug 2015 0.25 ND<0.02 ND<0.02 ND<0.02 ND<0.02 ND<0.02 0.12 0.097 0.217 NS28 8c Aug 2015 0.25
1 ND<0.02
ND<0.02
ND<0.02
ND<0.02
ND<0.02
ND<0.02

2.0 ND<0.02
ND<0.02
ND<0.02

0.86 ND<0.02

0.18 ND<0.02

3.04 ND
NS29 8c Aug 2015 0.25 ND<0.02 ND<0.02 ND<0.02 0.058 ND<0.02 0.11 0.089 0.257 TABLE 2
Summary of PCB Soil Sampling Results (EPA)
Boring ID Area Date Depth (ft) PCB 1016 PCB 1221 PCB 1232 PCB 1242 PCB 1248 PCB 1254 PCB 1260 Total PCB NS30 8h Aug 2015 0.25 ND<0.02 ND<0.02 ND<0.02 ND<0.02 ND<0.02 0.044 0.045 0.089 S1 8e Aug 2015 0.25

2.5 ND<0.02
ND<0.02
ND<0.02
ND<0.02
ND<0.02
ND<0.02
ND<0.02
ND<0.02
ND<0.02
ND<0.02
ND<0.02
ND<0.02
ND<0.02
ND<0.02
ND
ND
S2 8e Aug 2015 0.25

2.5 ND<0.02
ND<0.02
ND<0.02
ND<0.02
ND<0.02
ND<0.02
ND<0.02
ND<0.02
ND<0.02
ND<0.02

0.051
ND<0.02
ND<0.02
ND<0.02

0.051
ND
S3 8f Aug 2015 0.25

2.5 ND<0.02
ND<0.02
ND<0.02
ND<0.02
ND<0.02
ND<0.02
ND<0.02
ND<0.02
ND<0.02
ND<0.02

0.076
ND<0.02

0.047
ND<0.02

0.123
ND
S4 8d Aug 2015 0.25

2.5 ND<0.02
ND<0.02
ND<0.02
ND<0.02
ND<0.02
ND<0.02

0.14 ND<0.02
ND<0.02
ND<0.02

0.94 ND<0.02

0.071
ND<0.02

1.151
ND
S5 8e Aug 2015 0.25

2.5 ND<0.02
ND<0.02
ND<0.02
ND<0.02
ND<0.02
ND<0.02
ND<0.02
ND<0.02
ND<0.02
ND<0.02

0.17 ND<0.02

0.093
ND<0.02

0.263
ND
S6 8d Aug 2015 0.25 ND<0.02 ND<0.02 ND<0.02 19 ND<0.02 51 6.1 76.1 S7 12 Aug 2015 2.5 ND<0.02 ND<0.02 ND<0.02 ND<0.02 ND<0.02 ND<0.02 ND<0.02 ND S8 8a Aug 2015 2.5 ND<0.2 ND<0.2 ND<0.2 ND<0.2 ND<0.2 ND<0.2 ND<0.2 ND S9 8a Aug 2015 0.25 ND<0.02 ND<0.02 ND<0.02 0.12 ND<0.02 0.28 0.13 0.53 S10 12 Aug 2015 0.25

2.5 ND<0.02
ND<0.02
ND<0.02
ND<0.02
ND<0.02
ND<0.02

1.4 ND<0.02
ND<0.02
ND<0.02

4.3 ND<0.02

3.5 ND<0.02

9.2 ND
S11 8a Aug 2015 0.25
1 2.5
ND<0.2
ND<0.2
ND<0.02
ND<0.2
ND<0.2
ND<0.02
ND<0.2
ND<0.2
ND<0.02

1.6 ND<0.2
ND<0.02
ND<0.2
ND<0.2
ND<0.02

1.4 ND<0.2
ND<0.2

0.43 ND<0.2
ND<0.02

3.43 ND
ND
S12 8a Aug 2015 0.25 ND<0.02 ND<0.02 ND<0.02 ND<0.02 ND<0.02 ND<0.02 ND<0.02 ND S13 8a Aug 2015 0.25 ND<0.02 ND<0.02 ND<0.02 4.2 ND<0.02 1.6 0.3 6.1 S14 10b Aug 2015 0.25
1 2.5
ND<0.02
ND<0.2
ND<0.02
ND<0.02
ND<0.2
ND<0.02
ND<0.02
ND<0.2
ND<0.02

2.9 48
ND<0.2
ND<0.02
ND<0.2
ND<0.02
15 50

0.038

9.3 18
ND<0.02

27.2 116

0.038
S15 8c Aug 2015 0.25

2.5 ND<0.02
ND<0.02
ND<0.02
ND<0.02
ND<0.02
ND<0.02

0.23 ND<0.02
ND<0.02
ND<0.02

0.095
ND<0.02

0.023
ND<0.02

0.348
ND
S16 8b Aug 2015 2.5 ND<0.02 ND<0.02 ND<0.02 ND<0.02 ND<0.02 ND<0.02 ND<0.02 ND S17 8g Aug 2015 0.25 ND<0.02 ND<0.02 ND<0.02 0.026 ND<0.02 0.06 0.030 0.116 S18 8h Aug 2015 2.5 ND<0.02 ND<0.02 ND<0.02 ND<0.02 ND<0.02 ND<0.02 ND<0.02 ND S19 8g Aug 2015 0.25

2.5 ND<0.02
ND<0.02
ND<0.02
ND<0.02
ND<0.02
ND<0.02
ND<0.02
ND<0.02
ND<0.02
ND<0.02
ND<0.02
ND<0.02
ND<0.02
ND<0.02
ND
ND
ES1 10a Aug 2015 0.25

2.5 ND<0.2
ND<0.02
ND<0.2
ND<0.02
ND<0.2
ND<0.02
ND<0.2
ND<0.02
ND<0.2
ND<0.02
ND<0.2
ND<0.02
ND<0.2
ND<0.02
ND
ND
ES2 8b Aug 2015 0.25

2.5 ND<0.02
ND<0.02
ND<0.02
ND<0.02
ND<0.02
ND<0.02
ND<0.02
ND<0.02
ND<0.02
ND<0.02
ND<0.02
ND<0.02

0.022
ND<0.02

0.022
ND
ES3 8h Aug 2015 0.25 ND<0.02 ND<0.02 ND<0.02 ND<0.02 ND<0.02 0.410 0.170 0.58 TABLE 2
Summary of PCB Soil Sampling Results (EPA)
Boring ID Area Date Depth (ft) PCB 1016 PCB 1221 PCB 1232 PCB 1242 PCB 1248 PCB 1254 PCB 1260 Total PCB A8a-SB1 8a Jan 2011 1 ND<0.05 ND<0.1 ND<0.05 ND<0.05 ND<0.05 0.199 ND<0.05 0.199 A8a-SB2 8a Jan 2011 1 ND<0.05 ND<0.1 ND<0.05 ND<0.05 ND<0.05 0.790 ND<0.05 0.79 A8a-SB3 8a Jan 2011 1 ND<0.05 ND<0.1 ND<0.05 ND<0.05 2.96 2.66 ND<0.05 5.62 A8a-SB4 8a Jan 2011 1 ND<0.05 ND<0.1 ND<0.05 ND<0.05 ND<0.05 ND<0.05 ND<0.05 ND A8a-SB5 8a Jan 2011 1 ND<0.05 ND<0.1 ND<0.05 ND<0.05 8.15 4.62 ND<0.05 12.77 A8a-SB6 8a Jan 2011 1 ND<0.05 ND<0.1 ND<0.05 ND<0.05 26.8 5.95 ND<0.05 32.75 A8b-SB1 8b Jan 2011 1 ND<0.05 ND<0.1 ND<0.05 ND<0.05 369 125 ND<0.05 494 A8b-SB2 8b Jan 2011 1 ND<0.05 ND<0.1 ND<0.05 ND<0.05 ND<0.05 ND<0.05 ND<0.05 ND A8b-SB3 8b Jan 2011 1 ND<0.05 ND<0.1 ND<0.05 ND<0.05 0.18 0.274 ND<0.05 0.454 A8b-SB4 8b Jan 2011 1 ND<0.05 ND<0.1 ND<0.05 ND<0.05 ND<0.05 0.903 ND<0.05 0.903 A8c-SB1 8c Jan 2011 1 ND<0.05 ND<0.1 ND<0.05 ND<0.05 ND<0.05 ND<0.05 ND<0.05 ND A8c-SB2 8c Jan 2011 1 ND<0.05 ND<0.1 ND<0.05 ND<0.05 10.4 1.45 ND<0.05 11.85 A8c-SB3 8c Jan 2011 1 ND<0.05 ND<0.1 ND<0.05 ND<0.05 24.3 2.67 ND<0.05 26.97 A8c-SB4 8c Jan 2011 1 ND<0.05 ND<0.1 ND<0.05 ND<0.05 ND<0.05 ND<0.05 ND<0.05 ND A8d-SB1 8d Jan 2011 1 ND<0.05 ND<0.1 ND<0.05 ND<0.05 ND<0.05 ND<0.05 ND<0.05 ND A8d-SB2 8d Jan 2011 1 ND<0.05 ND<0.1 ND<0.05 ND<0.05 ND<0.05 5.84 ND<0.05 5.84 A8d-SB3 8d Jan 2011 1 ND<0.05 ND<0.1 ND<0.05 ND<0.05 ND<0.05 0.903 ND<0.05 0.903 A8d-SB4 8d Jan 2011 1 ND<0.05 ND<0.1 ND<0.05 ND<0.05 ND<0.05 0.372 ND<0.05 0.372 A8e-SB1 8e Jan 2011 1 ND<0.05 ND<0.1 ND<0.05 ND<0.05 ND<0.05 0.219 ND<0.05 0.219 A8e-SB2 8e Jan 2011 1 ND<0.05 ND<0.1 ND<0.05 ND<0.05 ND<0.05 0.109 ND<0.05 0.109 A8e-SB3 8e Jan 2011 1 ND<0.05 ND<0.1 ND<0.05 ND<0.05 ND<0.05 ND<0.05 ND<0.05 ND A8e-SB4 8e Jan 2011 1 ND<0.05 ND<0.1 ND<0.05 ND<0.05 ND<0.05 ND<0.05 62.8 62.8 A8e-SB5 8e Jan 2011 1 ND<0.05 ND<0.1 ND<0.05 ND<0.05 ND<0.05 ND<0.05 ND<0.05 ND A8e-SB6 8e Jan 2011 1 ND<0.05 ND<0.1 ND<0.05 ND<0.05 ND<0.05 1.43 ND<0.05 1.43 A8e-SB7 8e Jan 2011 1 ND<0.05 ND<0.1 ND<0.05 ND<0.05 ND<0.05 ND<0.05 ND<0.05 ND A8e-SB8 8e Jan 2011 1 ND<0.05 ND<0.1 ND<0.05 ND<0.05 ND<0.05 ND<0.05 ND<0.05 ND A8f-SB1 8f Jan 2011 1 ND<0.05 ND<0.1 ND<0.05 ND<0.05 ND<0.05 ND<0.05 ND<0.05 ND A8f-SB2 8f Jan 2011 1 ND<0.05 ND<0.1 ND<0.05 ND<0.05 ND<0.05 0.161 ND<0.05 0.161 A8f-SB3 8f Jan 2011 1 ND<0.05 ND<0.1 ND<0.05 ND<0.05 ND<0.05 3.070 ND<0.05 3.07 A8g-SB1 8g Jan 2011 1 ND<0.05 ND<0.1 ND<0.05 ND<0.05 ND<0.05 ND<0.05 ND<0.05 ND A8g-SB2 8g Jan 2011 1 ND<0.05 ND<0.1 ND<0.05 ND<0.05 ND<0.05 ND<0.05 ND<0.05 ND TABLE 2
Summary of PCB Soil Sampling Results (EPA)
Boring ID Area Date Depth (ft) PCB 1016 PCB 1221 PCB 1232 PCB 1242 PCB 1248 PCB 1254 PCB 1260 Total PCB A8g-SB3 8g Jan 2011 1 ND<0.05 ND<0.1 ND<0.05 ND<0.05 ND<0.05 ND<0.05 ND<0.05 ND A8h-SB1 8h Jan 2011 1 ND<0.05 ND<0.1 ND<0.05 ND<0.05 ND<0.05 ND<0.05 ND<0.05 ND A8h-SB10 8h Jan 2011 1 ND<0.05 ND<0.1 ND<0.05 ND<0.05 ND<0.05 ND<0.05 ND<0.05 ND A8h-SB2 8h Jan 2011 1 ND<0.05 ND<0.1 ND<0.05 ND<0.05 ND<0.05 1.3 ND<0.05 1.3 A8h-SB3 8h Jan 2011 1 ND<0.05 ND<0.1 ND<0.05 ND<0.05 1.18 0.699 ND<0.05 1.879 A8h-SB4 8h Jan 2011 1 ND<0.05 ND<0.1 ND<0.05 ND<0.05 1.57 0.552 ND<0.05 2.122 A8h-SB5 8h Jan 2011 1 ND<0.05 ND<0.1 ND<0.05 ND<0.05 ND<0.05 ND<0.05 ND<0.05 ND A8h-SB6 8h Jan 2011 1 ND<0.05 ND<0.1 ND<0.05 ND<0.05 0.084 ND<0.05 ND<0.05 0.084 A8h-SB7 8h Jan 2011 1 ND<0.05 ND<0.1 ND<0.05 ND<0.05 1.73 1.810 ND<0.05 3.54 A8h-SB8 8h Jan 2011 1 ND<0.05 ND<0.1 ND<0.05 ND<0.05 1.49 0.536 ND<0.05 2.026 A8h-SB9 8h Jan 2011 1 ND<0.05 ND<0.1 ND<0.05 ND<0.05 ND<0.05 ND<0.05 ND<0.05 ND A10a-SB1 10a Jan 2011 1 ND<0.05 ND<0.1 ND<0.05 ND<0.05 ND<0.05 ND<0.05 ND<0.05 ND A10a-SB2 10a Jan 2011 1 ND<0.05 ND<0.1 ND<0.05 ND<0.05 ND<0.05 ND<0.05 ND<0.05 ND A10b-SB1 10b Jan 2011 1 ND<0.05 ND<0.1 ND<0.05 ND<0.05 ND<0.05 0.112 ND<0.05 0.112 A10b-SB2 10b Jan 2011 1 ND<0.05 ND<0.1 ND<0.05 ND<0.05 2.190 1.29 ND<0.05 3.48 A10b-SB3 10b Jan 2011 1 ND<0.05 ND<0.1 ND<0.05 ND<0.05 ND<0.05 7.12 ND<0.05 7.12 A10b-SB4 10b Jan 2011 1 ND<0.05 ND<0.1 ND<0.05 ND<0.05 ND<0.05 ND<0.05 73.8 73.8 A12-SB1 12 Jan 2011 1 ND<0.05 ND<0.1 ND<0.05 ND<0.05 ND<0.05 ND<0.05 23 23 A12-SB2 12 Jan 2011 1 ND<0.05 ND<0.1 ND<0.05 ND<0.05 ND<0.05 ND<0.05 ND<0.05 ND A12-SB3 12 Jan 2011 1 ND<0.05 ND<0.1 ND<0.05 ND<0.05 0.123 ND<0.05 ND<0.05 0.123 A12-SB4 12 Jan 2011 1 ND<0.05 ND<0.1 ND<0.05 ND<0.05 0.205 0.120 ND<0.05 0.325 A12-SB5 12 Jan 2011 1 ND<0.05 ND<0.1 ND<0.05 ND<0.05 ND<0.05 ND<0.05 6.2 6.2 A13-SB1 13 Jan 2011 1 ND<0.05 ND<0.1 ND<0.05 ND<0.05 ND<0.05 0.425 ND<0.05 0.425 A13-SB2 13 Jan 2011 1 ND<0.05 ND<0.1 ND<0.05 ND<0.05 ND<0.05 ND<0.05 ND<0.05 ND A13-SB3 13 Jan 2011 1 ND<0.05 ND<0.1 ND<0.05 ND<0.05 ND<0.05 ND<0.05 ND<0.05 ND Duplicate Samples
A8e-SB7 (D1) 8e Jan 2011 1 ND<0.05 ND<0.1 ND<0.05 ND<0.05 ND<0.05 ND<0.05 0.165 0.165 A10b-SB4 (D2) 10b Jan 2011 1 ND<0.05 ND<0.1 ND<0.05 ND<0.05 ND<0.05 ND<0.05 69.5 69.5 A8a-SB1 (D3) 8a Jan 2011 1 ND<0.05 ND<0.1 ND<0.05 ND<0.05 ND<0.05 ND<0.05 ND<0.05 ND A8c-SB1 (D4) 8c Jan 2011 1 ND<0.05 ND<0.1 ND<0.05 ND<0.05 ND<0.05 ND<0.05 ND<0.05 ND A8a-SB4 (D5) 8a Jan 2011 1 ND<0.05 ND<0.1 ND<0.05 ND<0.05 0.224 0.236 ND<0.05 0.46 TABLE 2
Summary of PCB Soil Sampling Results (EPA)
Boring ID Area Date Depth (ft) PCB 1016 PCB 1221 PCB 1232 PCB 1242 PCB 1248 PCB 1254 PCB 1260 Total PCB A8h-SB9 (D6) 8h Jan 2011 1 ND<0.05 ND<0.1 ND<0.05 ND<0.05 ND<0.05 ND<0.05 ND<0.05 ND Notes: USEPA requires a table that shows all PCB sampling results in mg/kg, and with a total PCB column. The Aroclors presented were the only ones detected in the testing.

Samples with greater than 50 mg/Kg highlighted inRED.

GSI Job No.: 6239

Former Riverside Scrap Iron & Metal Property Response Plan

APPENDIX C.

Historical Distribution of PCE in Soil Gas

APPROXIMATE SCALE IN FEET
0 100 200
LEGEND
Soil Gas Sampling Locations (Amec 2015)
N
Maximum PCE Concentrations Shown in ug/L.

Concentrations >0.24 ug/L Shown inRED.

ES2

2.0 (5')
FIGURE 9A

DISTRIBUTION OF PCE IN SOIL GAS

RIVERSIDE SCRAP IRON & METAL
Riverside, California
Area 2
Area 13
Former Rail Tracks
Area 6
Western Farm Services
Area 8g
Area 7
Area 9
Existing
Buildings
Area 8h
S19
ND
S18
ND
Area 5
Area 4Area 14
S17

0.11 (15')
Area 8b
Area 12
S16

0.22 (12')
S13

0.21 (5')
S11

0.12 (15')
S10
NDS7

0.12 (15')
S8

0.39 (15')
Area 8c
S9

0.19 (15')
S15
ND
S12

0.10 (15')
Office
Area 10bArea 10a
Office
Maintenance
6th Street
5th Street
4th Street
Mission Inn Ave.

Area 8e
S4

0.1 (5')
S1

0.16 (15')
S5

0.10 (15')
S3

0.18 (15')
Area 11a Area 11b
Area 8f
Commerce Street
Commercial
Building
Area 8d
Existing
Building
2981 Mission Inn
Residence
2968 6th Street
Vacant Lot
2981 6th Street
Residence
2950 5th Street
Residence (No Access)
S14

0.11 (15')
Area 8a
Area 1
ES1
ND
ES3B
ND
S2
ND
S6

0.22 (15')

APPROXIMATE SCALE IN FEET
0 100 200
LEGEND
Soil Gas Sampling Locations (Amec 2015)
N
Maximum TCE Concentrations Shown in ug/L.

Concentrations >0.24 ug/L Shown inRED.

ES2

0.1 (15')
FIGURE 9B

DISTRIBUTION OF TCE IN SOIL GAS

0.11 (15')
Area 8b
Area 12
S16

0.13 (12')
S13
ND
S11
ND
S10

0.19 (5')S7
ND
S8
ND
Area 8c
S9

0.43 (15')
S15
ND
S12

0.12 (15')
Office
Area 10bArea 10a
Office
Maintenance
6th Street
5th Street
4th Street
Mission Inn Ave.

Area 8e
S4
ND
S1

0.31 (15')
S5

0.16 (15')
S3

0.41 (15')
Area 11a Area 11b
Area 8f
Commerce Street
Commercial
Building
Area 8d
Existing
Building
2981 Mission Inn
Residence
2968 6th Street
Vacant Lot
2981 6th Street
Residence
2950 5th Street
Residence (No Access)
S14
ND
Area 8a
Area 1
ES1
ND
ES3B
ND
S2

0.11 (15')
S6

0.57 (15')

APPROXIMATE SCALE IN FEET
0 100 200
LEGEND
Soil Gas Sampling Locations (Amec 2015)
Proposed Soil GasProbes (After Excavation Program)
N
Probes with Maximum TCE or PCE Concentrations
>0.24 ug/L Shown inRED.

ES2

0.1 (15')
FIGURE 9C

PROPOSED SOIL GAS PROBES

0.11 (15')
Area 8b
Area 12
S16

0.13 (12')
S13
ND
S11
ND
S10

0.19 (5')S7
ND
S8
ND
Area 8c
S9

0.43 (15')
S15
ND
S12

0.12 (15')
Office
Area 10bArea 10a
Office
Maintenance
6th Street
5th Street
4th Street
Mission Inn Ave.

Area 8e
S4
ND
S1

0.31 (15')
S5

0.16 (15')
S3

0.11 (15')
S6

0.57 (15')
Soil Gas Probe
Designation
Depth
(feet bgs)
Purge
Volume
(µg/L)
Date Chloro-
methane Freon 12 Freon 11 TCE PCE IPA Gasoline Range
Organics
390 440 3,100 3 2.1 880 NA
--- --- 10/1/2015 ND<0.10 ND<0.10 ND<0.10 ND<0.10 ND<0.10 ND<1.0 ND<10 --- --- 10/2/2015 ND<0.10 ND<0.10 ND<0.10 ND<0.10 ND<0.10 ND<1.0 ND<10 S1 5 3 10/1/2015 ND<0.10 ND<0.10 ND<0.10 ND<0.10 ND<0.10 ND<1.0 ND<10 S1 15 3 10/1/2015 ND<0.10 ND<0.10 ND<0.10 0.31 0.16 ND<1.0 ND<10 S2 5 3 10/1/2015 ND<0.10 ND<0.10 ND<0.10 ND<0.10 ND<0.10 ND<1.0 ND<10 S2 15 3 10/1/2015 ND<0.10 ND<0.10 ND<0.10 0.11 ND<0.10 ND<1.0 ND<10 S3 5 3 10/1/2015 ND<0.10 ND<0.10 ND<0.10 ND<0.10 ND<0.10 ND<1.0 ND<10 S3 15 3 10/1/2015 ND<0.10 ND<0.10 ND<0.10 0.37 0.17 ND<1.0 ND<10 S3 15 Dup 3 10/1/2015 ND<0.10 ND<0.10 ND<0.10 0.41 0.18 ND<1.0 ND<10 S4 5 3 10/1/2015 ND<0.10 ND<0.10 ND<0.10 ND<0.10 0.10 ND<1.0 ND<10 S4 15 3 10/1/2015 ND<0.10 ND<0.10 ND<0.10 ND<0.10 ND<0.10 ND<1.0 ND<10 S5 5 3 10/1/2015 ND<0.10 ND<0.10 ND<0.10 ND<0.10 ND<0.10 ND<1.0 ND<10 S5 15 3 10/1/2015 ND<0.10 ND<0.10 ND<0.10 0.16 0.10 ND<1.0 ND<10 S6 5 3 10/1/2015 ND<0.10 ND<0.10 ND<0.10 0.14 0.14 ND<1.0 ND<10 S6 15 3 10/1/2015 ND<0.10 ND<0.10 ND<0.10 0.57 0.22 ND<1.0 ND<10 S7 5 3 10/1/2015 ND<0.10 ND<0.10 ND<0.10 ND<0.10 ND<0.10 ND<1.0 ND<10 S7 15 3 10/1/2015 ND<0.10 ND<0.10 ND<0.10 ND<0.10 0.12 ND<1.0 ND<10 S8 5 3 10/1/2015 ND<0.10 ND<0.10 0.12 ND<0.10 ND<0.10 ND<1.0 ND<200 S8 15 3 10/1/2015 ND<0.10 ND<0.10 0.18 ND<0.10 0.39 ND<1.0 ND<10 S9 5 3 10/1/2015 ND<0.10 ND<0.10 ND<0.10 ND<0.10 ND<0.10 ND<1.0 ND<10 S9 15 3 10/1/2015 ND<0.10 ND<0.10 ND<0.10 0.43 0.19 ND<1.0 ND<10 S10 5 3 10/2/2015 ND<0.10 ND<0.10 0.21 0.19 ND<0.10 ND<1.0 ND<10 S10 15 3 10/2/2015 ND<0.10 ND<0.10 ND<0.10 ND<0.10 ND<0.10 ND<1.0 ND<10 S11 5 3 10/1/2015 ND<0.10 ND<0.10 1.9 ND<0.10 ND<0.10 ND<1.0 ND<10 S11 15 3 10/1/2015 ND<0.10 ND<0.10 2.6 ND<0.10 0.12 ND<1.0 ND<10 S11 15 Dup 3 10/1/2015 ND<0.10 ND<0.10 2.6 ND<0.10 0.12 ND<1.0 ND<10 S12 5 3 10/1/2015 ND<0.10 ND<0.10 1.1 ND<0.10 ND<0.10 ND<1.0 ND<10 S12 15 3 10/1/2015 ND<0.10
ND<0.10 1.5 0.12 0.10 ND<1.0 ND<10
S13 (see notes) 5 3 10/1/2015 0.49 0.28 15 ND<0.10 0.21 ND<1.0 ND<10 S13 (See notes) 15 3 10/1/2015 ND<0.10 0.34 12 ND<0.10 0.18 ND<1.0 ND<10 S14 5 3 10/2/2015 ND<0.10 ND<0.10 0.16 ND<0.10 ND<0.10 ND<1.0 ND<10 S14 15 3 10/2/2015 ND<0.10 ND<0.10 0.11 ND<0.10 0.11 ND<1.0 ND<10 S15 5 3 10/1/2015 ND<0.10 ND<0.10 1.4 ND<0.10 ND<0.10 ND<1.0 ND<10 S15 15 3 10/1/2015 ND<0.10 ND<0.10 1.0 ND<0.10 ND<0.10 ND<1.0 ND<10 S16A 5 3 10/2/2015 ND<0.10 ND<0.10 3.5 ND<0.10 0.12 ND<1.0 ND<10 S16A 12 3 10/2/2015 ND<0.10 ND<0.10 3.0 0.13 0.22 ND<1.0 ND<10 S17 5 3 10/2/2015 ND<0.10 ND<0.10 ND<0.10 ND<0.10 ND<0.10 ND<1.0 ND<10 S17 15 3 10/2/2015 ND<0.10 ND<0.10 ND<0.10 0.11 0.11 ND<1.0 ND<10 Ambient Air
TABLE 7

SUMMARY OF VOLATILE ORGANIC COMPOUNDS (VOCS) AND GASOLINE RANGE ORGANICS (GRO) IN SOIL GAS Riverside Scrap Iron & Metal Site
Riverside, California
Results reported in micrograms per liter (µg/L)
Industrial RSLs or DTSC-modified Screeing Level
P:\10468.000.0\10468.004.0\Docs\Additional Phase II ESA Report\Tables\Tables Amec Foster Wheeler

Page 1 of 2 ends

Soil Gas Probe
Designation
Depth
(feet bgs)
Purge
Volume
(µg/L)
Date Chloro-
methane Freon 12 Freon 11 TCE PCE IPA Gasoline Range
Organics
TABLE 7

SUMMARY OF VOLATILE ORGANIC COMPOUNDS (VOCS) AND GASOLINE RANGE ORGANICS (GRO) IN SOIL GAS Riverside Scrap Iron & Metal Site
Riverside, California
Results reported in micrograms per liter (µg/L)
S18 5 3 10/2/2015 ND<0.10UJ ND<0.10U
J 0.62J ND<0.10UJ ND<0.10UJ 3.3J ND<10
S18 15 3 10/2/2015 ND<0.10 ND<0.10 0.50 ND<0.10 ND<0.10 ND<1.0 ND<10 S18 15 Dup 3 10/2/2015 ND<0.10 ND<0.10 0.46 ND<0.10 ND<0.10 ND<1.0 ND<10 S19 5 3 10/2/2015 ND<0.10 ND<0.10 ND<0.10 ND<0.10 ND<0.10 ND<1.0 ND<10 S19 15 3 10/2/2015 ND<0.10 ND<0.10 ND<0.10 ND<0.10 ND<0.10 ND<1.0 ND<10 ES1 5 3 10/2/2015 ND<0.10 ND<0.10 ND<0.10 ND<0.10 ND<0.10 ND<1.0 ND<10 ES1 15 3 10/2/2015 ND<0.10 ND<0.10 ND<0.10 ND<0.10 ND<0.10 ND<1.0 ND<10 ES2 5 3 10/2/2015 ND<0.10 ND<0.10 0.78 ND<0.10 2.0 ND<1.0 ND<10 ES2 15 3 10/2/2015 ND<0.10 ND<0.10 0.69 0.10 1.1 ND<1.0 ND<10 ES3B 5 3 10/2/2015 ND<0.10 ND<0.10 ND<0.10 ND<0.10 ND<0.10 ND<1.0 ND<10 ES3B 5 Dup 3 10/2/2015 ND<0.10 ND<0.10 ND<0.10 ND<0.10 ND<0.10 ND<1.0 ND<10 ES3B 11.25 3 10/2/2015 ND<0.10 ND<0.10 0.19 ND<0.10 ND<0.10 ND<1.0 ND<10 Notes and Data Qualifiers
Volatile Organic Compounds (VOCs) and Gasoline Range Organics (GRO) were analyzed using United States Environmental Protection Agency (EPA) Method 8260M. All remaining VOCs were not detected. For a complete list of EPA 8260M analytes, see laboratory reports.

The Regional Screening Levels (RSLs) are from the EPA Region 9, revised June 2015, http://www.epa.gov/region9/superfund/prg/. RSLs were adjusted for a default (DTSC, 2011) attenuation factor for existing commercial buildings by multiplying the air RSLs by 1000 (representing a soil vapor-to-indoor air attenuation factor of 0.001. Therefore, the soil vapor screening levels presented are protective of existing buildings. The DTSC-modified screening level (DTSC, 2015) was used for PCE (italicized) because it was more conservative than the USEPA RSL.

S13 at 5 bgs and S13 at 15 feet bgs -Freon 11 concentrations from soil vapor samples exceeded the laboratory instrument calibration range. The samples were re-run at a higher dilution rate to quantify Freon 11 concentrations.

J - The analyte was positively identified. However, the leak detection compound IPA was detected in the sample at a concentration greater than 10 times the reporting limit of target analytes and therefore, the detected value is estimated.

UJ - The analyte was reported as not detected at the laboratory reporting limit. However, the leak detection compound IPA was detected in the sample at concentration greater than 10 times the reporting limit of the target analytes and therefore, the reporting limit is estimated.

Abbreviations
bgs = Below ground surface IPA = Isopropanol
ND = Not detected at the reporting limit shown NA = Not available DUP = Duplicate sample PCE = Tetrachloroethene
DTSC = Department of Toxic Substances Control RSL = Regional Screening Level Freon 11 = Trichlorofluoromethane TCE = Trichloroethene Freon 12 = Dichlorodifluoromethane µg/L = Micrograms per liter References
DTSC, 2015, Human Health Risk Assessment (HHRA) Note #3, DTSC-modified Screening Levels (DTSC-SLs), Human and Ecological Risk Office (HERO), October.

DTSC, 2011, Guidance for the Evaluation and Mitigation of Subsurface Vapor Intrusion to Indoor Air, October.

P:\10468.000.0\10468.004.0\Docs\Additional Phase II ESA Report\Tables\Tables Amec Foster Wheeler

Page 2 of 2 ends

GSI Job No.: 6239

Former Riverside Scrap Iron & Metal Property Response Plan

APPENDIX D.

Data from 2015 AMEC Investigation

Remedial Action Plan Hillmann Project C3-6687
Riverside Scrap Iron and Metal

APPENDIX A
AMEC Data
REFERENCE:

USGS 7.5 Minute Quadrangle Maps RIVERSIDE EAST, RIVERSIDE WEST, SAN BERNARDINO SOUTH, & FONTANA, California, 1967.

Photorevised 1980.
1 Date: 10/13/2015Project No. 010468.0040
Submitted By:grr Drawn By: jrw

SITE LOCATION MAP
Riverside Scrap Iron & Metal Site
Riverside, California
Approximate scale
0 1,000
S11
S12
NS21
NS20NS14
NS8
NS10
NS9
NS3
NS2
S3 S19
NS7
S13
S15S9
S6
S1
NS25 NS27 NS28 NS29
ES1
Plot Date: 10/16/2015 11:38:50 AM, Plotted by: joanna.worker Drawing Path: W:\Projects\010468.000 (Riverside Scrap Iron)\010468.004 (RSI&M)\ACAD\Sample Locs.dwg , Sample locs Explanation
Soil sampling location (Amec Foster Wheeler, 2015)
Soil sampling and soil gas probe location
(Amec Foster Wheeler, 2015)
Soil sample (Ami Adini & Associates, 2011)
Soil sample/duplicate (Ami Adini & Associates, 2011)
Site Area designation (Geomatrix, 2005)
Building
Former building or structure
Former scrap heap
Fence or wall
Former fence or wall
Riverside Marketplace Industrial District
Riverside Scrap Metal & Iron Site
Landscaped area
8h
S19
NS30
Notes:

1. All locations are approximate.

2. Scrap heaps shown from locations identified
in January/Febrary 2011 field work.
0 Approximate scale in meters
0 Approximate scale in feet
amec
foster
wheeler
Figure
2 Date: 10/16/2015 Project No. 010468.0040
Submitted By: grr Drawn By: jrw

SAMPLING LOCATIONS
Riverside Scrap Iron & Metal Site
Riverside, California
Basemap modified from a drawing by Ami Adini & Associates, dated April 2011, and an aerial photo by Eagle Aerials, dated February 2011.

S11
S12
NS21
NS20NS14
NS8
NS10
NS9
NS3
NS2
S3 S19
NS7
S13
S15S9
S6
S1
NS25 NS27 NS28 NS29
ES1
Polychlorinated Biphenyl (PCB) Concentrations
All Aroclors Not Detected
All Aroclors < Regional Screening Level (RSL)
One or more Aroclors > RSL
One or more Aroclors >10x RSL
0 Approximate scale in meters
0 Approximate scale in feet
amec
foster
wheeler
Figure
3a
Date: 10/27/2015 Project No. 010468.0040
Submitted By: grr Drawn By: jrw

PCB CONCENTRATIONS IN SOIL

0.25 FOOT
Riverside Scrap Iron & Metal Site
Riverside, California
Basemap modified from a drawing by Ami Adini & Associates, dated April 2011, and an aerial photo by Eagle Aerials, dated February 2011.

Plot Date: 10/27/2015 8:55:47 AM, Plotted by: joanna.worker Drawing Path: W:\Projects\010468.000 (Riverside Scrap Iron)\010468.004 (RSI&M)\ACAD\Results-2015.dwg , PCBs_0.25 NS1
S1
S2
S4
NS2
NS25 NS26
NS24
NS3S3
S5
S6
ES1
S12
ES2
S10
S14
NS15
S11
S13
NS27 NS28 NS29
NS10A
S15S9
NS8
NS18 NS30
S17
S19
ES3
Notes:

1. All locations are approximate.

2. RSLs are U.S. EPA Region 9 Industrial RSLs,
updated June 2015.

3. Locations that were not sampled or analyzed
have no color hi-lighting.

4. The posted concentration category for a
sample/sample duplicate pair is the higher of
the two categories if they differ.

5. Scrap heaps shown from locations identified
in January/Febrary 2011 field work
Fence or wall
Former fence or wall
Riverside Marketplace Industrial District
Riverside Scrap Metal & Iron Site
Landscaped area
Explanation
Soil sampling location (Amec Foster Wheeler, 2015)
Soil sampling and soil gas probe location
(Amec Foster Wheeler, 2015)
Soil sample (Ami Adini & Associates, 2011)
Soil sample/duplicate (Ami Adini & Associates, 2011)
Site Area designation (Geomatrix, 2005)
Building
Former building or structure
Former scrap heap
8h
S19
NS30
S11
S12
NS21
NS20NS14
NS8
NS10
NS9
NS3
NS2
S3 S19
NS7
S13
S15S9
S6
S1
NS25 NS27 NS28 NS29
ES1
Plot Date: 10/27/2015 9:01:48 AM, Plotted by: joanna.worker Drawing Path: W:\Projects\010468.000 (Riverside Scrap Iron)\010468.004 (RSI&M)\ACAD\Results-2015.dwg , PCBs_0.5-1 Polychlorinated Biphenyl (PCB) Concentrations
All Aroclors Not Detected
All Aroclors < Regional Screening Level (RSL)
One or more Aroclors > RSL
One or more Aroclors >10x RSL
One or more Aroclors >100x RSL
0 Approximate scale in meters
0 Approximate scale in feet
amec
foster
wheeler
Figure
3b
Date: Project No. 010468.0040
Submitted By: grr Drawn By: jrw

PCB CONCENTRATIONS IN SOIL

0.5 - 1 FOOT
Riverside Scrap Iron & Metal Site
Riverside, California
Basemap modified from a drawing by Ami Adini & Associates, dated April 2011, and an aerial photo by Eagle Aerials, dated February 2011.

NS25 NS26
NS2
NS28
Fence or wall
Former fence or wall
Riverside Marketplace Industrial District
Riverside Scrap Metal & Iron Site
Landscaped area
Explanation
Soil sampling location (Amec Foster Wheeler, 2015)
Soil sampling and soil gas probe location
(Amec Foster Wheeler, 2015)
Soil sample (Ami Adini & Associates, 2011)
Soil sample/duplicate (Ami Adini & Associates, 2011)
Site Area designation (Geomatrix, 2005)
Building
Former building or structure
Former scrap heap
8h
S19
NS30
10/27/2015
Notes:

1. All locations are approximate.

2. RSLs are U.S. EPA Region 9 Industrial RSLs,
updated June 2015.

3. Locations that were not sampled or analyzed
have no color hi-lighting.

4. The posted concentration category for a
sample/sample duplicate pair is the higher of
the two categories if they differ.

5. Scrap heaps shown from locations identified
in January/Febrary 2011 field work
S14
S11
S11
S12
NS21
NS20NS14
NS8
NS10
NS9
NS3
NS2
S3 S19
NS7
S13
S15S9
S6
S1
NS25 NS27 NS28 NS29
ES1
Polychlorinated Biphenyl (PCB) Concentrations
All Aroclors Not Detected
All Aroclors < Regional Screening Level (RSL)
One or more Aroclors > RSL
0 Approximate scale in meters
0 Approximate scale in feet
amec
foster
wheeler
Figure
3c
Date: 10/27/2015 Project No. 010468.0040
Submitted By: grr Drawn By: jrw

PCB CONCENTRATIONS IN SOIL

2.5 FEET
Riverside Scrap Iron & Metal Site
Riverside, California
Basemap modified from a drawing by Ami Adini & Associates, dated April 2011, and an aerial photo by Eagle Aerials, dated February 2011.

Plot Date: 10/27/2015 9:03:53 AM, Plotted by: joanna.worker Drawing Path: W:\Projects\010468.000 (Riverside Scrap Iron)\010468.004 (RSI&M)\ACAD\Results-2015.dwg , PCBs_2.5 NS13
S1
S2
S4
NS2
NS4
NS6
NS24
NS12
S3
S5
NS5
Notes:

1. All locations are approximate.

2. RSLs are U.S. EPA Region 9 Industrial
RSLs, updated June 2015.

3. Locations that were not sampled or
analyzed have no color hi-lighting.

4. The posted concentration category for a
sample/sample duplicate pair is the higher
of the two categories if they differ.

5. * = sample location NS20, Area 8h,
indicated concentration greater than RSL
for one or more Aroclors at 2.5 feet below
ground surface (bgs). Underlying sample at
5 feet bgs indicated RSL of one Aroclor
greater than the RSL.

6. Scrap heaps shown from locations identified
in January/Febrary 2011 field work
ES1
S7
ES2
S10
S14
NS15
S11 S18
NS14
NS11
NS9
NS7
S15
S8
NS8
NS18
NS20
S19
NS21
NS16
S16
NS19
NS17
Fence or wall
Former fence or wall
Riverside Marketplace Industrial District
Riverside Scrap Metal & Iron Site
Landscaped area
Explanation
Soil sampling location (Amec Foster Wheeler, 2015)
Soil sampling and soil gas probe location
(Amec Foster Wheeler, 2015)
Soil sample (Ami Adini & Associates, 2011)
Soil sample/duplicate (Ami Adini & Associates, 2011)
Site Area designation (Geomatrix, 2005)
Building
Former building or structure
Former scrap heap
8h
S19
NS30
*
*
S11
S12
NS21
NS20NS14
NS8
NS10
NS9
NS3
NS2
S3 S19
NS7
S13
S15S9
S6
S1
NS25 NS27 NS28 NS29
ES1
0 Approximate scale in meters
0 Approximate scale in feet
amec
foster
wheeler
Figure
4a
Date: 10/27/2015 Project No. 010468.0040
Submitted By: grr Drawn By: jrw

LEAD CONCENTRATIONS IN SOIL

S14
S19
S15
S11
ES1
ES2
S4
S2
S1
S3
S5
NS24
NS2 S12
NS1
Plot Date: 10/27/2015 9:34:38 AM, Plotted by: joanna.worker Drawing Path: W:\Projects\010468.000 (Riverside Scrap Iron)\010468.004 (RSI&M)\ACAD\Results-2015.dwg , Lead_0.25 Lead Concentrations
Lead <Regional Screening Level (RSL) of 800 micrograms per kilogram Lead >RSL
Notes:

1. All locations are approximate.

2. RSLs are U.S. EPA Region 9 Industrial
RSLs, updated June 2015.

3. Locations that were not sampled or
analyzed have no color hi-lighting.

4. The posted concentration category for
sample/sample duplicate pairs is the
higher of the two categories if they differ.

LEAD CONCENTRATIONS IN SOIL

S14
Plot Date: 10/27/2015 9:47:55 AM, Plotted by: joanna.worker Drawing Path: W:\Projects\010468.000 (Riverside Scrap Iron)\010468.004 (RSI&M)\ACAD\Results-2015.dwg , Lead_0.5-1 Fence or wall
Former fence or wall
Riverside Marketplace Industrial District
Riverside Scrap Metal & Iron Site
Landscaped area
Explanation
Soil sampling location (Amec Foster Wheeler, 2015)
Soil sampling and soil gas probe location
(Amec Foster Wheeler, 2015)
Soil sample (Ami Adini & Associates, 2011)
Soil sample/duplicate (Ami Adini & Associates, 2011)
Site Area designation (Geomatrix, 2005)
Building
Former building or structure
Former scrap heap
8h
S19
NS30
10/27/2015
Lead Concentrations
Lead <Regional Screening Level (RSL) of 800 micrograms per kilogram Lead >RSL
Notes:

1. All locations are approximate.

2. RSLs are U.S. EPA Region 9 Industrial
RSLs, updated June 2015.

3. Locations that were not sampled or
analyzed have no color hi-lighting.

4. Scrap heaps shown from locations
identified in January/Febrary 2011 field
work
S11
S15
S5
NS1
S11
S12
NS21
NS20NS14
NS8
NS10
NS9
NS3
NS2
S3 S19
NS7
S13
S15S9
S6
S1
NS25 NS27 NS28 NS29
ES1
0 Approximate scale in meters
0 Approximate scale in feet
amec
foster
wheeler
Figure
4c
Date: Project No. 010468.0040
Submitted By: grr Drawn By: jrw

LEAD CONCENTRATIONS IN SOIL

S14
S7
S8 NS7
S17
S18
S19
S16
S15
S13
S11
ES1
ES2
S4
S2
S1
S3
S5
NS9
NS3
NS24
NS2
NS8
NS10A
NS15
NS14
NS16
NS13
S12
Plot Date: 10/27/2015 9:49:46 AM, Plotted by: joanna.worker Drawing Path: W:\Projects\010468.000 (Riverside Scrap Iron)\010468.004 (RSI&M)\ACAD\Results-2015.dwg , Lead_2.5 Fence or wall
Former fence or wall
Riverside Marketplace Industrial District
Riverside Scrap Metal & Iron Site
Landscaped area
Explanation
Soil sampling location (Amec Foster Wheeler, 2015)
Soil sampling and soil gas probe location
(Amec Foster Wheeler, 2015)
Soil sample (Ami Adini & Associates, 2011)
Soil sample/duplicate (Ami Adini & Associates, 2011)
Site Area designation (Geomatrix, 2005)
Building
Former building or structure
Former scrap heap
8h
S19
NS30
10/27/2015
Lead Concentrations
Lead <Regional Screening Level (RSL) of 800 micrograms per kilogram Notes:

1. All locations are approximate.

2. RSLs are U.S. EPA Region 9 Industrial
RSLs, updated June 2015.

3. Locations that were not sampled or
analyzed have no color hi-lighting.

4. Scrap heaps shown from locations
identified in January/Febrary 2011 field
work
S11
S12
NS21
NS20NS14
NS8
NS10
NS9
NS3
NS2
S3 S19
NS7
S13
S15S9
S6
S1
NS25 NS27 NS28 NS29
ES1
0 Approximate scale in meters
0 Approximate scale in feet
amec
foster
wheeler
Figure
5a
Date: 10/27/2015 Project No. 010468.0040
Submitted By: grr Drawn By: jrw

PAH CONCENTRATIONS IN SOIL

Notes:

1. All locations are approximate.

2. RSLs are U.S. EPA Region 9 Industrial
RSLs, updated June 2015.

3. Scrap heaps shown from locations identified
in January/Febrary 2011 field work
S14
S19
S15
S11
ES1
ES2
S4
S2
S1
S3
S5
NS24
NS2 S12
NS1
Plot Date: 10/27/2015 9:25:38 AM, Plotted by: joanna.worker Drawing Path: W:\Projects\010468.000 (Riverside Scrap Iron)\010468.004 (RSI&M)\ACAD\Results-2015.dwg , PAH_0.25 Polynuclear Aromatic Hydrocarbon (PAH) Concentrations
All PAHs with Regional Screening Level (RSL) Not Detected ( indicates laboratory reporting limits > RSL)
All PAHs < RSL where available
One or more PAHs > RSL
Fence or wall
Former fence or wall
Riverside Marketplace Industrial District
Riverside Scrap Metal & Iron Site
Landscaped area
Explanation
Soil sampling location (Amec Foster Wheeler, 2015)
Soil sampling and soil gas probe location
(Amec Foster Wheeler, 2015)
Soil sample (Ami Adini & Associates, 2011)
Soil sample/duplicate (Ami Adini & Associates, 2011)
Site Area designation (Geomatrix, 2005)
Building
Former building or structure
Former scrap heap
8h
S19
NS30
**
**
**
**
**
**
S11
S12
NS21
NS20NS14
NS8
NS10
NS9
NS3
NS2
S3 S19
NS7
S13
S15S9
S6
S1
NS25 NS27 NS28 NS29
ES1
0 Approximate scale in meters
0 Approximate scale in feet
amec
foster
wheeler
Figure
5b
Date: Project No. 010468.0040
Submitted By: grr Drawn By: jrw

PAH CONCENTRATIONS IN SOIL

S14
Plot Date: 10/27/2015 9:27:09 AM, Plotted by: joanna.worker Drawing Path: W:\Projects\010468.000 (Riverside Scrap Iron)\010468.004 (RSI&M)\ACAD\Results-2015.dwg , PAH_0.5-1 Polynuclear Aromatic Hydrocarbon (PAH) Concentrations
All PAHs with Regional Screening Level (RSL) Not Detected All PAHs < RSL where available
One or more PAHs > RSL
Fence or wall
Former fence or wall
Riverside Marketplace Industrial District
Riverside Scrap Metal & Iron Site
Landscaped area
Explanation
Soil sampling location (Amec Foster Wheeler, 2015)
Soil sampling and soil gas probe location
(Amec Foster Wheeler, 2015)
Soil sample (Ami Adini & Associates, 2011)
Soil sample/duplicate (Ami Adini & Associates, 2011)
Site Area designation (Geomatrix, 2005)
Building
Former building or structure
Former scrap heap
8h
S19
NS30
10/27/2015
Notes:

1. All locations are approximate.

2. RSLs are U.S. EPA Region 9 Industrial
RSLs, updated June 2015.

3. Scrap heaps shown from locations identified
in January/Febrary 2011 field work
S11
S12
NS21
NS20NS14
NS8
NS10
NS9
NS3
NS2
S3 S19
NS7
S13
S15S9
S6
S1
NS25 NS27 NS28 NS29
ES1
Polynuclear Aromatic Hydrocarbon (PAH) Concentrations
All PAHs with Regional Screening Level (RSL) Not Detected All PAHs < RSL where available
One or more PAHs > RSL
0 Approximate scale in meters
0 Approximate scale in feet
amec
foster
wheeler
Figure
5c
Date: Project No. 010468.0040
Submitted By: grr Drawn By: jrw

PAH CONCENTRATIONS IN SOIL

Fence or wall
Former fence or wall
Riverside Marketplace Industrial District
Riverside Scrap Metal & Iron Site
Landscaped area
Explanation
Soil sampling location (Amec Foster Wheeler, 2015)
Soil sampling and soil gas probe location
(Amec Foster Wheeler, 2015)
Soil sample (Ami Adini & Associates, 2011)
Soil sample/duplicate (Ami Adini & Associates, 2011)
Site Area designation (Geomatrix, 2005)
Building
Former building or structure
Former scrap heap
8h
S19
NS30
S14
S19
S15
S11
ES1
ES2
S4
S2
S1
S3
S5
NS24
S12
S10
NS7
NS9
NS10A
NS14 NS17
NS18
NS20
NS21
S18
NS13
S16
NS11
Plot Date: 10/27/2015 9:29:29 AM, Plotted by: joanna.worker Drawing Path: W:\Projects\010468.000 (Riverside Scrap Iron)\010468.004 (RSI&M)\ACAD\Results-2015.dwg , PAH_2.5 10/27/2015
Notes:

1. All locations are approximate.

2. RSLs are U.S. EPA Region 9 Industrial
RSLs, updated June 2015.

3. Scrap heaps shown from locations identified
in January/Febrary 2011 field work
NS16
NS2
Plot Date: 10/27/2015 9:55:10 AM, Plotted by: joanna.worker Drawing Path: W:\Projects\010468.000 (Riverside Scrap Iron)\010468.004 (RSI&M)\ACAD\Results-2015.dwg , Soil Gas 0 Approximate scale in meters
0 Approximate scale in feet
amec
foster
wheeler
Figure
6 Date: 10/27/2015 Project No. 010468.0040
Submitted By: grr Drawn By: jrw

VOC CONCENTRATIONS IN

SOIL GAS
Riverside Scrap Iron & Metal Site
Riverside, California
Basemap modified from a drawing by Ami Adini & Associates, dated April 2011, and an aerial photo by Eagle Aerials, dated February 2011.

Site Area designation (Geomatrix, 2005)
Building
Former building or structure
Former scrap heap
Fence or wall
Former fence or wall
Riverside Marketplace Industrial District
Riverside Scrap Metal & Iron Site
Landscaped area
Explanation
Soil sampling and soil gas probe location
(Amec Foster Wheeler, 2015)
Results at depth indicated in feet below ground
surface for Volatile Organic Compounds (VOCs)
in micrograms per liter (µg/L)
8h
S19
Notes:

1. All locations are approximate.

2. Chloromethane detected at 0.49 µg/L in the
soil gas probe S13 at depth of 5 feet below
ground surface (bgs).

3. Leak detection compound Isopropyl alcohol
detected at 3.3 µg/L in the soil gas probe S18
at depth of 5 feet bgs.

4. Scrap heaps shown from locations identified
in January/Febrary 2011 field work
S18
Freon 12 (dichlorodifluoromethane)
Freon 11 (trichlorofluoromethane)
Trichloroethene
Tetrachloroethene
Duplicate sample
Not detected at laboratory limit of <0.10
Not sampled
Estimated concentration based on detection of leak detection compound Estimated reporting limit based on detection of leak detection compound S19
S18
S17S7
S8
S11
S13
S16A
S10
S15S12
S14
S3
S1
S2
S4
S6
S9
S5S1
Sample Name
R12
R11
TCE
PCE
DUP
ND
NS
J
UJ
S2
S17S3 S5
S4
S6
ES2
ES1
S9 S15
S7
Commerce Street
S10
S14
S8
S11
S13 (See Note 2)
S16A
ES3B
S19
S12
ES3B
ES3
ES2
ES1
S18 (See Note 3)
GSI Job No.: 6239

Former Riverside Scrap Iron & Metal Property Response Plan

APPENDIX E.

Historical Off-Site Sampling Locations

APPROXIMATE SCALE IN FEET
0 150 300
LEGEND
Soil Sampling Locations (Amec 2015)
Soil/Soil Gas Sampling Locations (Amec 2015)
Soil Sampling Locations (AAA 2011)
Off-Site Sampling Locations
N
FIGURE 2

GENERAL SITE PLAN

RIVERSIDE SCRAP IRON & METAL
Riverside, California
Area 2
Area 13
Former Rail Tracks
A13-SB3
A13-SB2
Area 6
Western Farm Services
A13-
SB1
A8g-SB3
Area 8g
A8g-SB2A8g-SB1
Area 7
Area 9
Existing
Buildings
Area 8h
A8h-SB6
A8h-SB5
A8h-SB10
S19
S18
A8h-SB7
A8h-SB8
NS19
ES3B
ES3
NS17 NS20
NS30NS18
A8h-SB4
A8h-SB3
A8h-SB2A8h-
SB1
A8h-SB9
A8b-
SB4
NS21
Area 5
Area 4Area 14
NS16
S17
NS10A
Area 8b
Area 12
ES3A
ES2
A8b-
SB3
A8b-
SB2
A8b-SB1
S16
S13
S11
S10S7
S8
Former
Bailer
A8a-SB3 NS7
NS9
A8a-SB5
A8a-SB6
A8a-SB4
Area 8cNS10
S9
NS8
A8c-SB3
A8c-SB2
A8c-SB1
NS15
S15
NS29S12NS27
NS28
A8a-SB2A8a-SB1
Shed
Office
A8c-SB4
A12-SB4A12-SB3
A12-SB1
A12-SB2
A12-SB5
Area 10b
NS13
NS12
A10b-SB2
A10b-SB1
A10b-SB4
A10b-SB3
A10a-SB2
Area 10a
A10a-SB1
Office
Maintenance
ES1
Compactor
6th Street
5th Street
4th Street
Mission Inn Ave.

Area 8e
S6
NS26
NS4
A8e-SB8
A8e-SB7
A8e-SB6
NS24
A8d-SB3
A8d-
SB4
S4
A8d-SB2
S2
A8e-SB5
NS2
NS25
A8d-SB1
NS1
S1
A8e-SB1
A8e-SB2 A8e-SB3
A8e-SB4
NS6
S5
S3
Area 11a Area 11b
Area 8f
A8f-SB1
A8f-SB2
A8f-SB3
Commerce Street
Commercial
Building
NS3
Area 8d
NS5
Former
Diesel
AST
Existing
Building
2981 Mission Inn
Residence
2968 6th Street
Vacant Lot
2981 6th Street
Residence
2950 5th Street
Residence (No Access)
NS11
S14
Area 8a
Frmr Machine
Shop
NS14
Area 1
S1 S2 S3 S4
S5 S6 S7 S8
S12
S13
S11
S14
S10
S15
S9
S16
S17
S24 S23
S18
S22
S19
S21
S20
S25
S26
S27
S28
S36 S34
S35
S37
S38
S39
S40
S29
S30
S31
S32
S33
See Figure 3A See Figure 3B
Riverside Scrap
Mission Inn
Ave 6th St
2981 Mission Inn
North
Scale
1-inch = 40 ft
FIGURE 3A
Off-Site Soil Sampling Locations
Riverside Scrap
Riverside CA
2968 6th
S4
S5
S3
S6
S2
S7
S1
S8
S11
S14
S12
S13
S9
S16
S10
S15
Riverside Scrap
6th St 5th St
2981 6th 2980 5th
(No Access)
North
Scale
1-inch = 40 ft
FIGURE 3B
Off-Site Soil Sampling Locations
Riverside Scrap
Riverside CA
S20
S21S22
S23
S24
S17 S18 S19
GSI Job No.: 6239
Former Riverside Scrap Iron & Metal Property Response Plan APPENDIX F.

Summary Table for PCB Delineation
PCB-1016 PCB-1221 PCB-1232 PCB-1242 PCB-1248 PCB-1254 PCB-1260 Total PCBs
A8a-SB1 8a SB1 NA 1/27/2011 1 <0.05 <0.1 <0.05 <0.05 <0.05 0.199 <0.05 0.199 A8a-SB2 8a SB2 NA 1/27/2011 1 <0.05 <0.1 <0.05 <0.05 <0.05 0.79 <0.05 0.79 A8a-SB3 8a SB3 NA 1/27/2011 1 <0.05 <0.1 <0.05 <0.05 2.96 2.66 <0.05 5.62 A8a-SB4 8a SB4 NA 1/27/2011 1 <0.05 <0.1 <0.05 <0.05 <0.05 <0.05 <0.05 All ND A8a-SB5 8a SB5 NA 1/27/2011 1 <0.05 <0.1 <0.05 <0.05 8.15 4.6 <0.05 12.75 A8a-SB6 8a SB6 NA 1/27/2011 1 <0.05 <0.1 <0.05 <0.05 26.8 5.95 <0.05 32.75 NS9 8a NS9 NA 8/11/2015 2.5 <0.02 <0.02 <0.02 <0.02 <0.02 <0.02 <0.02 All ND S12 8a S12 NA 8/12/2015 0.25 <0.02 <0.02 <0.02 <0.02 <0.02 <0.02 <0.02 All ND S9 8a S9 NA 8/12/2015 0.25 <0.02UJ <0.02UJ <0.02UJ .120J <0.02UJ 0.280J 0.130J 0.53 S11 8a S11 NA 8/13/2015 0.25 <0.2 <0.2 <0.2 1.6 <0.2 1.4J 0.43 3.43 S11 8a S11 NA 8/13/2015 1 <0.2 <0.2 <0.2 <0.2 <0.2 <0.2 <0.2 All ND S11 8a S11 NA 8/13/2015 2.5 <0.02 <0.02 <0.02 <0.02 <0.02 <0.02 <0.02 All ND S8 8a S8 NA 8/13/2015 2.5 <0.2 <0.2 <0.2 <0.2 <0.2 <0.2 <0.2 All ND S13 8a S13 NA 8/14/2015 0.25 <0.02 <0.02 <0.02 4.2 <0.02 1.6 0.3 6.1 NS7 8a NS7 NA 8/21/2015 2.5 <0.02 <0.02 <0.02 0.055 <0.02 0.11 0.058 0.223 NS8 8a NS8 NA 8/21/2015 0.25 <0.02UJ <0.02UJ <0.02UJ 2.2J <0.02UJ .350J 0.110J 2.66 NS8 8a NS8 NA 8/21/2015 2.5 <0.02 <0.02 <0.02 <0.02 <0.02 <0.02 <0.02 All ND A8b-SB2 8b SB2 NA 1/28/2011 1 <0.05 <0.1 <0.05 <0.05 <0.05 <0.05 <0.05 All ND A8b-SB3 8b SB3 NA 1/28/2011 1 <0.05 <0.1 <0.05 <0.05 0.18 0.274 <0.05 0.454 A8b-SB4 8b SB4 NA 1/28/2011 1 <0.05 <0.1 <0.05 <0.05 <0.05 0.903 <0.05 0.903 ES2 8b ES2 NA 8/14/2015 0.25 <0.02UJ <0.02UJ <0.02UJ <0.02UJ <0.02UJ <0.02UJ 22J 22 ES2 8b ES2 NA 8/14/2015 2.5 <0.02 <0.02 <0.02 <0.02 <0.02 <0.02 <0.02 All ND S16 8b S16 NA 8/14/2015 2.5 <0.02 <0.02 <0.02 <0.02 <0.02 <0.02 <0.02 All ND A8b-SB1 8b SB1 Initial >50 Sample 1/27/2011 1 <0.05 <0.1 <0.05 <0.05 369 125 <0.05 494 A8b-SB1X-2.5 8b SB1 X 1/23/2018 2.5 <0.055 <0.055 <0.055 <0.055 <0.055 <0.055 <0.055 <0.055 <0.055 All ND A8b-SB1A-1 8b SB1 A 1/23/2018 1 <0.054 <0.054 <0.054 <0.054 <0.054 <0.054 <0.054 <0.054 <0.054 All ND A8b-SB1A-2.5 8b SB1 A 1/23/2018 2.5 <0.056 <0.056 <0.056 <0.056 <0.056 <0.056 <0.056 <0.056 <0.056 All ND A8b-SB1B-1 8b SB1 B 1/23/2018 1 <0.054 0.25 <0.054 <0.054 <0.054 <0.054 <0.054 <0.054 <0.054 0.25 A8b-SB1B-2.5 8b SB1 B 1/23/2018 2.5 <0.055 <0.055 <0.055 <0.055 <0.055 <0.055 <0.055 <0.055 <0.055 All ND A8b-SB1C-1 8b SB1 C 1/23/2018 1 <0.055 <0.055 <0.055 <0.055 0.26 0.14 <0.055 <0.055 <0.055 0.4 A8b-SB1C-2.5 8b SB1 C 1/23/2018 2.5 <0.055 <0.055 <0.055 <0.055 <0.055 <0.055 <0.055 <0.055 <0.055 All ND A8b-SB1D-1 8b SB1 D 1/23/2018 1 <0.054 <0.054 <0.054 <0.054 <0.054 <0.054 <0.054 <0.054 <0.054 All ND A8b-SB1D-2.5 8b SB1 D 1/23/2018 2.5 <0.054 <0.054 <0.054 <0.054 <0.054 <0.054 <0.054 <0.054 <0.054 All ND depth
(feet bgs)
EPA Method 8082 (mg/kg)
Table 1
Polychlorinated Biphenyls (PCBs) in Soil
Riverside Scrap Iron & Metal Site
Riverside, California
Sample/
Boring
ID
Area Sample
Location
2018 Investigation
Step-Out Sample
Designation or
Information
Sample Date
Remedial Action Plan
Area 8A
Area 8B
page 1 of 9
PCB-1016 PCB-1221 PCB-1232 PCB-1242 PCB-1248 PCB-1254 PCB-1260 Total PCBs
depth
(feet bgs)
EPA Method 8082 (mg/kg)
Table 1
Polychlorinated Biphenyls (PCBs) in Soil
Riverside Scrap Iron & Metal Site
Riverside, California
Sample/
Boring
ID
Area Sample
Location
2018 Investigation
Step-Out Sample
Designation or
Information
Sample Date
Remedial Action Plan

A8c-SB1 8c SB1 NA 1/27/2011 1 <0.05 <0.1 <0.05 <0.05 <0.05 <0.05 <0.05 All ND A8c-SB2 8c SB2 NA 1/27/2011 1 <0.05 <0.1 <0.05 <0.05 10.4 1.4 <0.05 11.8 A8c-SB3 8c SB3 NA 1/27/2011 1 <0.05 <0.1 <0.05 <0.05 24.3 2.67 <0.05 26.97 A8c-SB4 8c SB4 NA 1/27/2011 1 <0.05 <0.1 <0.05 <0.05 <0.05 <0.05 <0.05 All ND NS14 8c NS14 NA 8/14/2015 2.5 <0.02 <0.02 <0.02 <0.02 <0.02 <0.02 <0.02 All ND NS15 8c NS15 NA 8/14/2015 0.25 <0.02 <0.02 <0.02 1.5 <0.02 1.6 0.29 3.39 NS15 8c NS15 NA 8/14/2015 2.5 <0.02 <0.02 <0.02 <0.02 <0.02 <0.02 <0.02 All ND NS10A 8c NS10A NA 8/21/2015 0.25 <0.02UJ <0.02UJ <0.02UJ .110J <0.02UJ .200J 0.100J 0.41 A8d-SB1 8d SB1 NA 1/26/2011 1 <0.05 <0.1 <0.05 <0.05 <0.05 <0.05 <0.05 All ND A8d-SB2 8d SB2 NA 1/26/2011 1 <0.05 <0.1 <0.05 <0.05 <0.05 5.84 <0.05 5.84 A8d-SB3 8d SB3 NA 1/26/2011 1 <0.05 <0.1 <0.05 <0.05 <0.05 0.903 <0.05 0.903 A8d-SB4 8d SB4 NA 1/26/2011 1 <0.05 <0.1 <0.05 <0.05 <0.05 0.372 <0.05 0.372 NS25 8d NS25 NA 8/18/2015 0.25 <0.02UJ <0.02UJ <0.02UJ <0.02UJ <0.02UJ 1.3J 0.140J 1.44 NS25 8d NS25 NA 8/18/2015 1 <0.02 <0.02 <0.02 <0.02 <0.02 0.042 <0.02 0.042 NS26 8d NS26 NA 8/12/2015 0.25 <0.02UJ <0.02UJ <0.02UJ 0.32J <0.02UJ 12J 1.600J 13.92 NS26 8d NS26 NA 8/12/2015 1 <0.02 <0.02 <0.02 <0.02 <0.02 <0.02 <0.02 All ND NS27 8d NS27 NA 8/12/2015 0.25 <0.02 <0.02 <0.02 <0.02 <0.02 0.012 0.097 0.109 NS28 8d NS28 NA 8/12/2015 0.25 <0.02UJ <0.02UJ <0.02UJ 2.0J <0.02UJ 0.86J .180J 3.04 NS28 8d NS28 NA 8/12/2015 1 <0.02 <0.02 <0.02 <0.02 <0.02 <0.02 <0.02 All ND NS29 8d NS29 NA 8/12/2015 0.25 <0.02UJ <0.02UJ <0.02UJ 0.058J <0.02UJ 0.11J 0.089J 0.257 NS30 8d NS30 NA 8/21/2015 0.25 <0.02UJ <0.02UJ <0.02UJ <0.02UJ <0.02UJ 0.044J 0.045J 0.089 S4 8d S4 NA 8/18/2015 0.25 <0.02 <0.02 <0.02 0.14 <0.02 0.94 0.071 1.151 S4 8d S4 NA 8/18/2015 2.5 <0.02 <0.02 <0.02 <0.02 <0.02 <0.02 <0.02 All ND S5 8d S5 NA 8/12/2015 0.25 <0.02 <0.02 <0.02 <0.02 <0.02 0.17 0.093 0.263 S5 8d S5 NA 8/12/2015 2.5 <0.02 <0.02 <0.02 <0.02 <0.02 <0.02 <0.02 All ND NS2 8d NS2 NA 8/18/2015 0.25 <0.02 <0.02 <0.02 8.6 <0.02 28 2.3J 38.9 NS2 8d NS2 Initial >50 Sample 8/18/2015 1 <0.02UJ <0.02UJ <0.02UJ 62J <0.02UJ 290J 34J 386 NS2 8d NS2 Initial >50 Sample 8/18/2015 2.5 <0.02 <0.02 <0.02 <0.02 <0.02 0.023 <0.02 0.023 NS2A-1 8d NS2 A 1/23/2018 1 <55 <55 <55 <55 500 670 <55 <55 <55 1170 NS2A-2.5 8d NS2 A 1/23/2018 2.5 <0.054 <0.054 <0.054 <0.054 0.21 0.41 <0.054 <0.054 <0.054 0.62 NS2B-1 8d NS2 B 1/23/2018 1 <53 <53 <53 <53 350 520 <53 <53 <53 870 NS2B-2.5 8d NS2 B 1/23/2018 2.5 <0.27 <0.27 <0.27 <0.27 1.3 1.8 <0.27 <0.27 <0.27 3.1 NS2C-1 8d NS2 C 1/23/2018 1 <5.7 <5.7 <5.7 <5.7 39 71 <5.7 <5.7 <5.7 110 NS2C-2.5 8d NS2 C 1/23/2018 2.5 <0.28 <0.28 <0.28 <0.28 0.65 1.5 <0.28 <0.28 <0.28 2.15 NS2D-1 8d NS2 D 1/23/2018 1 <55 <55 <55 <55 150 280 <55 <55 <55 430 NS2D-2.5 8d NS2 D 1/23/2018 2.5 <0.055 <0.055 <0.055 <0.055 0.12 0.2 <0.055 <0.055 <0.055 0.32 NS2E-0.5 8d NS2 E 5/18/2018 0.5 <5.4 <5.4 <5.4 <5.4 17 23 <5.4 <5.4 <5.4 40 NS2E-1 8d NS2 E 5/18/2018 1 <0.55 <0.55 <0.55 <0.55 1.1 1.8 <0.55 <0.55 <0.55 2.9 NS2F-0.5 8d NS2 F 5/18/2018 0.5 <0.053 <0.053 <0.053 <0.053 0.2 0.11 <0.053 <0.053 <0.053 0.31 NS2F-1 8d NS2 F 5/18/2018 1 <5.6 <5.6 <5.6 <5.6 11 13 <5.6 <5.6 <5.6 24 NS2G-0.5 8d NS2 G 5/18/2018 0.5 <0.55 <0.55 <0.55 <0.55 4.3 8.3 <0.55 <0.55 <0.55 12.6 NS2G-1 8d NS2 G 5/18/2018 1 <5.3 <5.3 <5.3 <5.3 13 28 <5.3 <5.3 <5.3 41 NS2H-0.5 8d NS2 H 5/18/2018 0.5 <5.4 <5.4 <5.4 <5.4 210 330 <5.4 <5.4 <5.4 540 NS2H-1 8d NS2 H 5/18/2018 1 <2.7 <2.7 <2.7 <2.7 7.3 14 <2.7 <2.7 <2.7 21.3 Area 8C
Area 8D
page 2 of 9
PCB-1016 PCB-1221 PCB-1232 PCB-1242 PCB-1248 PCB-1254 PCB-1260 Total PCBs
depth
(feet bgs)
EPA Method 8082 (mg/kg)
Table 1
Polychlorinated Biphenyls (PCBs) in Soil
Riverside Scrap Iron & Metal Site
Riverside, California
Sample/
Boring
ID
Area Sample
Location
2018 Investigation
Step-Out Sample
Designation or
Information
Sample Date
Remedial Action Plan
NS2I-0.5 8d NS2 I 5/18/2018 0.5 <0.054 <0.054 <0.054 <0.054 <0.054 <0.054 <0.054 <0.054 <0.054 All ND NS2I-1 8d NS2 I 5/18/2018 1 <0.51 <0.51 <0.51 <0.51 0.78 2 <0.51 <0.51 <0.51 2.78 NS2K-0.5 8d NS2 K 5/18/2018 0.5 <0.051 <0.051 <0.051 <0.051 0.21 0.12 <0.051 <0.051 <0.051 0.33 NS2K-1 8d NS2 K 5/18/2018 1 <5.3 <5.3 <5.3 <5.3 43 67 <5.3 <5.3 <5.3 110 NS2KK-2.5 8d NS2 KK 8/3/2018 2.5 <0.053 <0.053 <0.053 <0.053 0.082 0.16 <0.053 <0.053 <0.053 0.242 NS2KK1-1 8d NS2 KK1 8/3/2018 1 <2.6 <2.6 <2.6 <2.6 6.8 29 <2.6 <2.6 <2.6 35.8 NS2L-0.5 8d NS2 L 5/18/2018 0.5 <0.11 <0.11 <0.11 <0.11 0.49 0.26 <0.11 <0.11 <0.11 0.75 NS2L-1 8d NS2 L 5/18/2018 1 <0.54 <0.54 <0.54 <0.54 75 280 <0.54 <0.54 <0.54 355 NS2LL-2.5 8d NS2 LL 8/3/2018 2.5 <0.26 <0.26 <0.26 <0.26 <0.26 1.2 <0.26 <0.26 <0.26 1.2 NS2M-0.5 8d NS2 M 5/18/2018 0.5 <5.4 <5.4 <5.4 <5.4 98 86 <5.4 <5.4 <5.4 184 NS2M-1 8d NS2 M 5/18/2018 1 <0.57 <0.57 <0.57 <0.57 1.4 3 <0.57 <0.57 <0.57 4.4 NS2N-0.5 8d NS2 N 5/18/2018 0.5 <0.5 <0.5 <0.5 <0.5 3.2 <0.5 <0.5 <0.5 <0.5 3.2 NS2N-1 8d NS2 N 5/18/2018 1 <54 <54 <54 <54 410 670 <54 <54 <54 1080 NS2NN1-1 8d NS2 NN 8/3/2018 1 <1.1 <1.1 <1.1 <1.1 5.3 12 <1.1 <1.1 <1.1 17.3 NS2NN-2.5 8d NS2 NN 8/3/2018 2.5 <5.3 <5.3 <5.3 <5.3 14 30 <5.3 <5.3 <5.3 44 NS2O-0.5 8d NS2 O 5/18/2018 0.5 <0.51 <0.51 <0.51 <0.51 3.9 <0.51 <0.51 <0.51 <0.51 3.9 NS2O-1 8d NS2 O 5/18/2018 1 <5.2 <5.2 <5.2 <5.2 21 43 <5.2 <5.2 <5.2 64 NS2OO1-1 8d NS2 OO 8/3/2018 1 <0.53 <0.53 <0.53 <0.53 4.5 4 <0.53 <0.53 <0.53 8.5 NS2OO-2.5 8d NS2 OO 8/3/2018 2.5 <0.054 <0.054 <0.054 <0.054 <0.054 0.065 <0.054 <0.054 <0.054 0.065 NS2P-0.5 8d NS2 P 5/18/2018 0.5 <0.054 <0.054 <0.054 <0.054 0.19 <0.054 <0.054 <0.054 <0.054 0.19 NS2P-1 8d NS2 P 5/18/2018 1 <5.4 <5.4 <5.4 <5.4 44 25 <5.4 <5.4 <5.4 69 NS2PP1-1 8d NS2 PP 8/3/2018 1 <5.3 <5.3 <5.3 <5.3 88 53 <5.3 <5.3 <5.3 141 NS2PP-2.5 8d NS2 PP 8/3/2018 2.5 <0.054 <0.054 <0.054 <0.054 0.11 0.13 <0.054 <0.054 <0.054 0.24 NS2PP1-2.5 8d NS2 PP1 8/3/2018 2.5 <0.055 <0.055 <0.055 <0.055 <0.055 <0.055 <0.055 <0.055 <0.055 All ND NS2PP2-1 8d NS2 PP2 8/3/2018 1 <0.52 <0.52 <0.52 <0.52 3.4 3.5 <0.52 <0.52 <0.52 6.9 NS2PP3-1.0 8d NS2 PP3 9/27/2018 1 <5.2 <5.2 <5.2 <5.2 42 37 <5.2 79 NS2PP3-2.5 8d NS2 PP3 9/27/2018 2.5 <0.054 <0.054 <0.054 <0.054 <0.054 <0.054 <0.054 <0.054 <0.054 All ND NS2PP4-1.0 8d NS2 PP4 9/27/2018 1 <0.52 <0.52 <0.52 <0.52 1.9 4.3 <0.52 6.2 NS2PP5-1.0 8d NS2 PP5 9/27/2018 1 <55 <55 <55 <55 630 760 <55 1390 NS2PP5-2.5 8d NS2 PP5 9/27/2018 2.5 <0.054 <0.054 <0.054 <0.054 <0.054 1.2 <0.054 <0.054 <0.054 1.2 NS2PP6-1.0 8d NS2 PP6 9/27/2018 1 <5.4 <5.4 <5.4 <5.4 310 600 <5.4 <5.4 <5.4 910 NS2PP6-2.5 8d NS2 PP6 9/27/2018 2.5 <0.054 <0.054 <0.054 <0.054 0.19 0.25 <0.054 <0.054 <0.054 0.44 NS2PP7-1.0 8d NS2 PP7 9/27/2018 1 <0.053 <0.053 <0.053 <0.053 <0.053 0.12 <0.053 <0.053 <0.053 0.12 NS2PP7-2.5 8d NS2 PP7 9/27/2018 2.5 <0.054 <0.054 <0.054 <0.054 <0.054 <0.054 <0.054 <0.054 <0.054 All ND NS2PP0-1 8d NS2 PP9 9/27/2018 1 <0.052 <0.052 <0.052 <0.052 0.61 1 <0.052 1.61 NS2PP9-2.5 8d NS2 PP9 9/27/2018 2.5 <0.053 <0.053 <0.053 <0.053 <0.053 <0.053 <0.053 <0.053 <0.053 All ND NS2PP10-1.0 8d NS2 PP10 9/27/2018 1 <0.053 <0.053 <0.053 <0.053 11 19 <0.053 <0.053 <0.053 30 NS2PP10-2.5 8d NS2 PP10 9/27/2018 2.5 <0.052 <0.052 <0.052 <0.052 0.13 0.1 <0.052 <0.052 <0.052 0.23 NS2Q-0.5 8d NS2 Q 5/18/2018 0.5 <0.052 <0.052 <0.052 <0.052 <0.052 <0.052 <0.052 <0.052 <0.052 All ND NS2Q-1 8d NS2 Q 5/18/2018 1 <0.054 <0.054 <0.054 <0.054 0.075 0.068 <0.054 <0.054 <0.054 0.143 S6 8d S6 Initial >50 Sample 8/12/2015 0.25 <0.02UJ <0.02UJ <0.02UJ 16J <0.02UJ 51J 6.10J 73.1 S6X-2.5 8d S6 X 1/23/2018 2.5 <0.054 <0.054 <0.054 <0.054 0.4 0.52 <0.054 <0.054 <0.054 0.92 S6A-1 8d S6 A 1/23/2018 1 <0.054 <0.054 <0.054 <0.054 <0.054 0.062 <0.054 <0.054 <0.054 0.062 S6A-2.5 8d S6 A 1/23/2018 2.5 <0.054 <0.054 <0.054 <0.054 <0.054 0.12 <0.054 <0.054 <0.054 0.12 S6B-1 8d S6 B 1/23/2018 1 <0.053 <0.053 <0.053 <0.053 0.096 0.44 <0.053 <0.053 <0.053 0.536 S6B-2.5 8d S6 B 1/23/2018 2.5 <0.053 <0.053 <0.053 <0.053 0.078 0.32 <0.053 <0.053 <0.053 0.398 page 3 of 9
PCB-1016 PCB-1221 PCB-1232 PCB-1242 PCB-1248 PCB-1254 PCB-1260 Total PCBs
depth
(feet bgs)
EPA Method 8082 (mg/kg)
Table 1
Polychlorinated Biphenyls (PCBs) in Soil
Riverside Scrap Iron & Metal Site
Riverside, California
Sample/
Boring
ID
Area Sample
Location
2018 Investigation
Step-Out Sample
Designation or
Information
Sample Date
Remedial Action Plan
S6C-1 8d S6 C 1/23/2018 1 <0.054 <0.054 <0.054 <0.054 <0.054 <0.054 <0.054 <0.054 <0.054 All ND S6C-2.5 8d S6 C 1/23/2018 2.5 <0.053 <0.053 <0.053 <0.053 <0.053 <0.053 <0.053 <0.053 <0.053 All ND S6D-1 8d S6 D 1/23/2018 1 <0.054 <0.054 <0.054 <0.054 0.39 0.66 <0.054 <0.054 <0.054 1.05 S6D-2.5 8d S6 D 1/23/2018 2.5 <0.055 <0.055 <0.055 <0.055 <0.055 <0.055 <0.055 <0.055 <0.055 All ND A8e-SB1 8e SB1 NA 1/25/2011 1 <0.05 <0.1 <0.05 <0.05 <0.05 0.219 <0.05 0.219 A8e-SB2 8e SB2 NA 1/25/2011 1 <0.05 <0.1 <0.05 <0.05 <0.05 0.109 <0.05 0.109 A8e-SB3 8e SB3 NA 1/25/2011 1 <0.05 <0.1 <0.05 <0.05 <0.05 <0.05 <0.05 All ND A8e-SB5 8e SB5 NA 1/26/2011 1 <0.05 <0.1 <0.05 <0.05 <0.05 <0.05 <0.05 All ND A8e-SB6 8e SB6 NA 1/26/2011 1 <0.05 <0.1 <0.05 <0.05 <0.05 1.43 <0.05 1.43 A8e-SB7 8e SB7 NA 1/26/2011 1 <0.05 <0.1 <0.05 <0.05 <0.05 <0.05 <0.05 All ND A8e-SB8 8e SB8 NA 1/26/2011 1 <0.05 <0.1 <0.05 <0.05 <0.05 <0.05 <0.05 All ND NS1 8e NS1 NA 8/10/2015 0.25 <0.02 <0.02 <0.02 <0.02 <0.02 0.094 0.057 0.151 NS24 8e NS24 NA 8/10/2015 0.25 <0.02 <0.02 <0.02 <0.02 <0.02 0.024 0.021 0.045 NS24 8e NS24 NA 8/10/2015 2.5 <0.02UJ <0.02UJ <0.02UJ <0.02UJ <0.02UJ <0.02UJ <0.02UJ All ND NS4 8e NS4 NA 8/10/2015 2.5 <0.02 <0.02 <0.02 <0.02 <0.02 0.13 0.033 0.163 NS6 8e NS6 NA 8/10/2015 2.5 <0.02 <0.02 <0.02 <0.02 <0.02 <0.02 <0.02 All ND S1 8e S1 NA 8/11/2015 0.25 <0.02 <0.02 <0.02 <0.02 <0.02 <0.02 <0.02 All ND S1 8e S1 NA 8/11/2015 2.5 <0.02 <0.02 <0.02 <0.02 <0.02 <0.02 <0.02 All ND S2 8e S2 NA 8/12/2015 0.25 <0.02 <0.02 <0.02 <0.02 <0.02 0.051 <0.02 0.051 S2 8e S2 NA 8/12/2015 2.5 <0.02 <0.02 <0.02 <0.02 <0.02 <0.02 <0.02 All ND A8e-SB4 8e SB4 Initial >50 Sample 1/25/2011 1 <0.05 <0.1 <0.05 <0.05 <0.05 <0.05 62.8 62.8 A8e-SB4X-2.5 8e SB4 X 1/23/2018 2.5 <0.055 <0.055 <0.055 <0.055 <0.055 <0.055 <0.055 <0.055 <0.055 All ND A8e-SB4A-1 8e SB4 A 1/23/2018 1 <0.056 <0.056 <0.056 <0.056 <0.056 <0.056 <0.056 <0.056 <0.056 All ND A8e-SB4A-2.5 8e SB4 A 1/23/2018 2.5 <0.055 <0.055 <0.055 <0.055 <0.055 <0.055 <0.055 <0.055 <0.055 All ND A8e-SB4B-1 8e SB4 B 1/23/2018 1 <0.055 <0.055 <0.055 <0.055 0.35 0.39 <0.055 <0.055 <0.055 0.74 A8e-SB4B-2.5 8e SB4 B 1/23/2018 2.5 <0.056 <0.056 <0.056 <0.056 <0.056 <0.056 <0.056 <0.056 <0.056 All ND A8e-SB4C-1 8e SB4 C 1/23/2018 1 <5.7 <5.7 <5.7 <5.7 48 76 <5.7 <5.7 <5.7 124 A8e-SB4C-2.5 8e SB4 C 1/23/2018 2.5 <0.055 <0.055 <0.055 <0.055 <0.055 <0.055 <0.055 <0.055 <0.055 All ND A8e-SB4D-1 8e SB4 D 1/23/2018 1 <0.056 <0.056 <0.056 <0.056 0.16 0.39 <0.056 <0.056 <0.056 0.55 A8e-SB4D-2.5 8e SB4 D 1/23/2018 2.5 <0.055 <0.055 <0.055 <0.055 <0.055 <0.055 <0.055 <0.055 <0.055 All ND A8e-SB4E-0.5 8e SB4 E 5/18/2018 0.5 <0.053 <0.053 <0.053 <0.053 0.17 0.2 <0.053 <0.053 <0.053 0.37 A8e-SB4E-1 8e SB4 E 5/18/2018 1 <0.055 <0.055 <0.055 <0.055 0.11 0.072 <0.055 <0.055 <0.055 0.182 A8e-SB4F-0.5 8e SB4 F 5/18/2018 0.5 <0.053 <0.053 <0.053 <0.053 0.18 0.25 0.11 <0.053 <0.053 0.54 A8e-SB4F-1 8e SB4 F 5/18/2018 1 <0.057 <0.057 <0.057 <0.057 <0.057 <0.057 <0.057 <0.057 <0.057 All ND A8e-SB4G-0.5 8e SB4 G 5/18/2018 0.5 <0.052 <0.052 <0.052 <0.052 0.17 0.71 <0.052 <0.052 <0.052 0.88 A8e-SB4G-1 8e SB4 G 5/18/2018 1 <0.054 <0.054 <0.054 <0.054 <0.054 <0.054 <0.054 <0.054 <0.054 All ND A8f-SB1 8f SB1 NA 1/25/2011 1 <0.05 <0.1 <0.05 <0.05 <0.05 <0.05 <0.05 All ND A8f-SB2 8f SB2 NA 1/25/2011 1 <0.05 <0.1 <0.05 <0.05 <0.05 0.161 <0.05 0.161 A8f-SB3 8f SB3 NA 1/25/2011 1 <0.05 <0.1 <0.05 <0.05 <0.05 3.07 <0.05 3.07 NS3 8f NS3 NA 8/10/2015 0.25 <0.02 <0.02 <0.02 <0.02 <0.02 0.047 0.043 0.09 NS5 8f NS5 NA 8/10/2015 2.5 <0.02 <0.02 <0.02 <0.02 <0.02 <0.02 <0.02 All ND S3 8f S3 NA 8/11/2015 0.25 <0.02 <0.02 <0.02 <0.02 <0.02 0.076 0.047 0.123 S3 8f S3 NA 8/11/2015 2.5 <0.02 <0.02 <0.02 <0.02 <0.02 <0.02 <0.02 All ND Area 8E
Area 8F
Area 8G
page 4 of 9
PCB-1016 PCB-1221 PCB-1232 PCB-1242 PCB-1248 PCB-1254 PCB-1260 Total PCBs
depth
(feet bgs)
EPA Method 8082 (mg/kg)
Table 1
Polychlorinated Biphenyls (PCBs) in Soil
Riverside Scrap Iron & Metal Site
Riverside, California
Sample/
Boring
ID
Area Sample
Location
2018 Investigation
Step-Out Sample
Designation or
Information
Sample Date
Remedial Action Plan
A8g-SB1 8g SB1 NA 1/26/2011 1 <0.05 <0.1 <0.05 <0.05 <0.05 <0.05 <0.05 All ND A8g-SB2 8g SB2 NA 1/26/2011 1 <0.05 <0.1 <0.05 <0.05 <0.05 <0.05 <0.05 All ND A8g-SB3 8g SB3 NA 1/26/2011 1 <0.05 <0.1 <0.05 <0.05 <0.05 <0.05 <0.05 All ND S17 8g S17 NA 8/14/2015 0.25 <0.02 <0.02 <0.02 0.026 <0.02 0.06 0.03 0.116 S19 8g S19 NA 8/14/2015 0.25 <0.02 <0.02 <0.02 <0.02 <0.02 <0.02 <0.02 All ND S19 8g S19 NA 8/14/2015 2.5 <0.02 <0.02 <0.02 <0.02 <0.02 <0.02 <0.02 All ND A8h-SB1 8h SB1 NA 1/28/2011 1 <0.05 <0.1 <0.05 <0.05 <0.05 <0.05 <0.05 All ND A8h-SB10 8h SB10 NA 1/28/2011 1 <0.05 <0.1 <0.05 <0.05 <0.05 <0.05 <0.05 All ND A8h-SB2 8h SB2 NA 1/28/2011 1 <0.05 <0.1 <0.05 <0.05 <0.05 1.3 <0.05 1.3 A8h-SB3 8h SB3 NA 1/28/2011 1 <0.05 <0.1 <0.05 <0.05 1.18 0.699 <0.05 1.879 A8h-SB4 8h SB4 NA 1/28/2011 1 <0.05 <0.1 <0.05 <0.05 1.57 0.552 <0.05 2.122 A8h-SB5 8h SB5 NA 1/28/2011 1 <0.05 <0.1 <0.05 <0.05 <0.05 <0.05 <0.05 All ND A8h-SB6 8h SB6 NA 1/28/2011 1 <0.05 <0.1 <0.05 <0.05 0.054 <0.05 <0.05 0.054 A8h-SB7 8h SB7 NA 1/28/2011 1 <0.05 <0.1 <0.05 <0.05 1.73 1.81 <0.05 3.54 A8h-SB8 8h SB8 NA 1/28/2011 1 <0.05 <0.1 <0.05 <0.05 1.49 0.536 <0.05 2.026 A8h-SB9 8h SB9 NA 1/28/2011 1 <0.05 <0.1 <0.05 <0.05 <0.05 <0.05 <0.05 All ND ES3 8h ES3 NA 8/14/2015 0.25 <0.02 <0.02 <0.02 0.2 <0.02 0.41 0.17 0.78 S18 8h S18 NA 8/14/2015 2.5 <0.02 <0.02 <0.02 <0.02 <0.02 <0.02 <0.02 All ND NS17 8h NS17 NA 8/21/2015 2.5 <0.02 <0.02 <0.02 <0.02 <0.02 <0.02 <0.02 All ND NS18 8h NS18 NA 8/21/2015 0.25 <0.02UJ <0.02UJ <0.02UJ .250J <0.02UJ .420J 0.150J 0.82 NS18 8h NS18 NA 8/21/2015 2.5 <0.02 <0.02 <0.02 <0.02 <0.02 <0.02 <0.02 All ND NS19 8h NS19 NA 8/21/2015 2.5 <0.02 <0.02 <0.02 <0.02 <0.02 <0.02 <0.02 All ND NS20 8h NS20 NA 8/21/2015 2.5 <0.02UJ <0.02UJ <0.02UJ 3.2J <0.02UJ 1.500J 1.1J 5.8 NS20 8h NS20 NA 8/21/2015 5 <0.02UJ <0.02UJ <0.02UJ 1.1J <0.02UJ .480J 0.290J 1.87 NS21 8h NS21 NA 8/21/2015 2.5 <0.02 <0.02 <0.02 <0.02 <0.02 <0.02 <0.02 All ND A10a-SB1 10a SB1 NA 1/28/2011 1 <0.05 <0.1 <0.05 <0.05 <0.05 <0.05 <0.05 All ND A10a-SB2 10a SB2 NA 1/28/2011 1 <0.05 <0.1 <0.05 <0.05 <0.05 <0.05 <0.05 All ND ES1 10a ES1 NA 8/19/2015 0.25 <0.2 <0.2 <0.2 <0.2 <0.2 <0.2 <0.2 All ND ES1 10a ES1 NA 8/19/2015 2.5 <0.02 <0.02 <0.02 <0.02 <0.02 <0.02 <0.02 All ND A10b-SB1 10b SB1 NA 1/26/2011 1 <0.05 <0.1 <0.05 <0.05 <0.05 0.112 <0.05 0.112 A10b-SB2 10b SB2 NA 1/26/2011 1 <0.05 <0.1 <0.05 <0.05 2.19 1.29 <0.05 3.48 A10b-SB3 10b SB3 NA 1/26/2011 1 <0.05 <0.1 <0.05 <0.05 <0.05 7.12 <0.05 7.12 S15 10b S15 NA 8/12/2015 0.25 <0.02UJ <0.02UJ <0.02UJ 0.230J <0.02UJ 0.095J 0.023J 0.348 S15 10b S15 NA 8/12/2015 2.5 <0.02 <0.02 <0.02 <0.02 <0.02 <0.02 <0.02 0 NS11 10b NS11 NA 8/11/2015 2.5 <0.02 <0.02 <0.02 <0.02 <0.02 0.039 0.027 0.066 NS12 10b NS12 NA 8/13/2015 2.5 <0.02 <0.02 <0.02 <0.02 <0.02 <0.02 <0.02 All ND NS13 10b NS13 NA 8/13/2015 2.5 <0.02 <0.02 <0.02 0.071 <0.02 0.076 0.032 0.179 S14 10b S14 Initial >50 Sample 8/13/2015 1 <0.2 <0.2 <0.2 48J <0.02 50J 18.0J 116 S14 10b S14 Initial >50 Sample 8/13/2015 2.5 <0.02 <0.02 <0.02 <0.02 <0.02 0.038 <0.02 0.038 S14 10b S14 Initial >50 Sample 8/13/2015 0.25 <0.02UJ <0.02UJ <0.02UJ 2.9J <0.02UJ 15J 9.30J 27.2 S14A-1 10b S14 A 1/23/2018 1 <5.7 <5.7 <5.7 <5.7 50 33 22 <5.7 <5.7 105 S14A-2.5 10b S14 A 1/23/2018 2.5 <0.057 <0.057 <0.057 <0.057 0.097 <0.057 <0.057 <0.057 <0.057 0.097 S14B-1 10b S14 B 1/23/2018 1 <2.8 <2.8 <2.8 <2.8 14 13 10 <2.8 <2.8 37 Area 8H
Area 10A
Area 10B
page 5 of 9
PCB-1016 PCB-1221 PCB-1232 PCB-1242 PCB-1248 PCB-1254 PCB-1260 Total PCBs
depth
(feet bgs)
EPA Method 8082 (mg/kg)
Table 1
Polychlorinated Biphenyls (PCBs) in Soil
Riverside Scrap Iron & Metal Site
Riverside, California
Sample/
Boring
ID
Area Sample
Location
2018 Investigation
Step-Out Sample
Designation or
Information
Sample Date
Remedial Action Plan
S14B-2.5 10b S14 B 1/23/2018 2.5 <0.056 <0.056 <0.056 <0.056 <0.056 <0.056 <0.056 <0.056 <0.056 0 S14C-1 10b S14 C 1/23/2018 1 <0.54 <0.54 <0.54 <0.54 8.5 11 11 <0.54 <0.54 30.5 S14C-2.5 10b S14 C 1/23/2018 2.5 <5.5 <5.5 <5.5 <5.5 82 47 8.9 <5.5 <5.5 137.9 S14C-5 10b S14 C 1/23/2018 5 <0.055 <0.055 <0.055 <0.055 0.28 0.23 <0.055 <0.055 <0.055 0.51 S14D-1 10b S14 D 1/23/2018 1 <3 <3 <3 <3 43 36 22 <3 <3 101 S14D-2.5 10b S14 D 1/23/2018 2.5 <0.056 <0.056 <0.056 <0.056 <0.056 <0.056 <0.056 <0.056 <0.056 All ND S14BB-0.5 10b S14 BB 5/18/2018 0.5 <0.52 <0.52 <0.52 <0.52 9.3 7.8 8.3 <0.52 <0.52 25 S14BB-1 10b S14 BB 5/18/2018 1 <0.54 <0.54 <0.54 <0.54 7.1 8.4 9.2 <0.54 <0.54 25 S14E-0.5 10b S14 E 5/18/2018 0.5 <0.55 <0.55 <0.55 <0.55 6.7 <0.55 260 <0.55 <0.55 270 S14E-1 10b S14 E 5/18/2018 1 <0.57 <0.57 <0.57 <0.57 39 13 4 <0.57 <0.57 56 S14F-0.5 10b S14 F 5/18/2018 0.5 <5.2 <5.2 <5.2 <5.2 16 9.7 10 <5.2 <5.2 36 S14F-1 10b S14 F 5/18/2018 1 <2.7 <2.7 <2.7 <2.7 17 <2.7 37 <2.7 <2.7 53 S14G-0.5 10b S14 G 5/18/2018 0.5 <2.6 <2.6 <2.6 <2.6 9.4 9.4 10 <2.6 <2.6 29 S14G-1 10b S14 G 5/18/2018 1 <2.7 <2.7 <2.7 <2.7 11 14 32 <2.7 <2.7 57 S14G-2.5 10b S14 G 5/18/2018 2.5 <0.26 <0.26 <0.26 <0.26 0.6 2.5 5.2 <0.26 <0.26 8.2 S14H-0.5 10b S14 H 5/18/2018 0.5 <2.5 <2.5 <2.5 <2.5 12 10 12 <2.5 <2.5 34 S14H-1 10b S14 H 5/18/2018 1 <2.7 <2.7 <2.7 <2.7 9.7 8 8.9 <2.7 <2.7 27 S14H-2.5 10b S14 H 5/18/2018 2.5 <0.052 <0.052 <0.052 <0.052 0.23 0.32 0.52 <0.052 <0.052 1.1 S14I-0.5 10b S14 I 5/18/2018 0.5 <5.4 <5.4 <5.4 <5.4 13 8.4 8.8 <5.4 <5.4 30 S14I-1 10b S14 I 5/18/2018 1 <2.7 <2.7 <2.7 <2.7 3.7 <2.7 12 <2.7 <2.7 16 S14I-2.5 10b S14 I 5/18/2018 2.5 <2.7 <2.7 <2.7 <2.7 6.3 <2.7 28 <2.7 <2.7 34 S14J-0.5 10b S14 J 5/18/2018 0.5 <0.053 <0.053 <0.053 <0.053 0.26 0.089 0.064 <0.053 <0.053 0.42 S14J-1 10b S14 J 5/18/2018 1 <0.61 <0.61 <0.61 <0.61 1.1 <0.61 30 <0.61 <0.61 31 S14K-0.5 10b S14 K 5/18/2018 0.5 <0.52 <0.52 <0.52 <0.52 4.3 3 3.5 <0.52 <0.52 11 S14K-1 10b S14 K 5/18/2018 1 <6 <6 <6 <6 13 13 20 <6 <6 46 S14L-0.5 10b S14 L 5/18/2018 0.5 <0.25 <0.25 <0.25 <0.25 1.4 <0.25 1.3 <0.25 <0.25 2.7 S14L-1 10b S14 L 5/18/2018 1 <0.55 <0.55 <0.55 <0.55 6.1 <0.55 57 <0.55 <0.55 64 S14M-0.5 10b S14 M 5/18/2018 0.5 <0.51 <0.51 <0.51 <0.51 5.7 <0.51 75 <0.51 <0.51 81 S14M-1 10b S14 M 5/18/2018 1 <0.54 <0.54 <0.54 <0.54 3.5 <0.54 28 <0.54 <0.54 31 S14E1-0.5 10b S14 E1 7/26/2018 0.5 <0.53 <0.53 <0.53 <0.53 <0.53 <0.53 7.2 <0.53 <0.53 7.2 S14EE-2.5 10b S14 EE 7/26/2018 2.5 <0.052 <0.052 <0.052 <0.052 0.085 <0.052 <0.052 <0.052 <0.052 0.085 S14FF-2.5 10b S14 FF 7/26/2018 2.5 <0.054 <0.054 <0.054 <0.054 1.6 1.1 0.43 <0.054 <0.054 3.1 S14FF1-1 10b S14 FF1 7/26/2018 1 <2.6 <2.6 <2.6 <2.6 12 19 15 <2.6 <2.6 46 S14G1-1 10b S14 G1 7/26/2018 1 <2.6 <2.6 <2.6 <2.6 12 15 12 <2.6 <2.6 39 S14G2-1 10b S14 G2 7/26/2018 1 <2.6 <2.6 <2.6 <2.6 9.8 14 11 <2.6 <2.6 35 S14LL-2.5 10b S14 LL 7/26/2018 2.5 <0.055 <0.055 <0.055 <0.055 0.17 <0.055 0.2 <0.055 <0.055 0.37 S14LL1-1 10b S14 LL1 7/26/2018 1 <0.55 <0.55 <0.55 <0.55 3.3 3.3 2.7 <0.55 <0.55 9.4 S14LL2-1 10b S14 LL2 7/26/2018 1 <0.54 <0.54 <0.54 <0.54 6.9 <0.54 1.3 <0.54 <0.54 8.2 S14LL3-0.5 10b S14 LL3 7/26/2018 0.5 <0.52 <0.52 <0.52 <0.52 9.4 6.9 1.7 <0.52 <0.52 18 S14LL3-1 10b S14 LL3 7/26/2018 1 <0.056 <0.056 <0.056 <0.056 15 12 13 <0.056 <0.056 40 S14M1-0.5 10b S14 M1 7/26/2018 0.5 <2.5 <2.5 <2.5 <2.5 17 12 7.5 <2.5 <2.5 36 S14M1-1 10b S14 M1 7/26/2018 1 <2.6 <2.6 <2.6 <2.6 44 <2.6 5 <2.6 <2.6 49 A10b-SB4 10b SB4 Initial >50 Sample 1/26/2011 1 <0.05 <0.1 <0.05 <0.05 <0.05 <0.05 73.8 73.8 A10b-SB4X-2.5 10b SB4 X 1/23/2018 2.5 <0.055 <0.055 <0.055 <0.055 0.087 <0.055 0.35 <0.055 <0.055 0.44 A10b-SB4A-1 10b SB4 A 1/23/2018 1 <5.6 <5.6 <5.6 <5.6 <5.6 <5.6 37 <5.6 <5.6 37 A10b-SB4A-2.5 10b SB4 A 1/23/2018 2.5 <0.055 <0.055 <0.055 <0.055 <0.055 <0.055 0.14 <0.055 <0.055 0.14 page 6 of 9
PCB-1016 PCB-1221 PCB-1232 PCB-1242 PCB-1248 PCB-1254 PCB-1260 Total PCBs
depth
(feet bgs)
EPA Method 8082 (mg/kg)
Table 1
Polychlorinated Biphenyls (PCBs) in Soil
Riverside Scrap Iron & Metal Site
Riverside, California
Sample/
Boring
ID
Area Sample
Location
2018 Investigation
Step-Out Sample
Designation or
Information
Sample Date
Remedial Action Plan
A10b-SB4B-1 10b SB4 B 1/23/2018 1 <28 <28 <28 <28 <28 <28 140 <28 <28 140 A10b-SB4B-2.5 10b SB4 B 1/23/2018 2.5 <0.056 <0.056 <0.056 <0.056 <0.056 <0.056 0.24 <0.056 <0.056 0.24 A10b-SB4C-1 10b SB4 C 1/23/2018 1 <0.055 <0.055 <0.055 <0.055 <0.055 <0.055 1.1 <0.055 <0.055 1.2 A10b-SB4C-2.5 10b SB4 C 1/23/2018 2.5 <0.054 <0.054 <0.054 <0.054 <0.054 <0.054 0.13 <0.054 <0.054 0.13 A10b-SB4D-1 10b SB4 D 1/23/2018 1 <5.6 <5.6 <5.6 <5.6 <5.6 <5.6 19 <5.6 <5.6 19 A10b-SB4D-2.5 10b SB4 D 1/23/2018 2.5 <0.055 <0.055 <0.055 <0.055 <0.055 <0.055 0.12 <0.055 <0.055 0.12 A10b-SB4AA-0.5 10b SB4 AA 5/18/2018 0.5 <0.52 <0.52 <0.52 <0.52 6.8 <0.52 87 <0.52 <0.52 94 A10b-SB4AA-1 10b SB4 AA 5/18/2018 1 <0.054 <0.054 <0.054 <0.054 <0.054 <0.054 <0.054 <0.054 <0.054 All ND A10b-SB4E-0.5 10b SB4 E 5/18/2018 0.5 <1.1 <1.1 <1.1 <1.1 2.7 <1.1 26 <1.1 <1.1 29 A10b-SB4E-1 10b SB4 E 5/18/2018 1 <0.28 <0.28 <0.28 <0.28 0.72 <0.28 21 <0.28 <0.28 22 A10b-SB4F-0.5 10b SB4 F 5/18/2018 0.5 <0.056 <0.056 <0.056 <0.056 0.26 0.31 0.46 <0.056 <0.056 1 A10b-SB4F-1 10b SB4 F 5/18/2018 1 <0.055 <0.055 <0.055 <0.055 <0.055 <0.055 0.096 <0.055 <0.055 0.096 A10b-SB4G-0.5 10b SB4 G 5/18/2018 0.5 <0.27 <0.27 <0.27 <0.27 0.91 1.8 2.1 <0.27 <0.27 4.8 A10b-SB4G-1 10b SB4 G 5/18/2018 1 <27 <27 <27 <27 <27 <27 2600 <27 <27 2600 A10b-SB4J-0.5 10b SB4 J 5/18/2018 0.5 <0.27 <0.27 <0.27 <0.27 0.32 0.64 1.3 <0.27 <0.27 2.2 A10b-SB4J-1 10b SB4 J 5/18/2018 1 <0.055 <0.055 <0.055 <0.055 0.057 <0.055 0.13 <0.055 <0.055 0.19 A10b-SB4K-0.5 10b SB4 K 5/18/2018 0.5 <0.054 <0.054 <0.054 <0.054 0.11 <0.054 2.4 <0.054 <0.054 2.5 A10b-SB4K-1 10b SB4 K 5/18/2018 1 <27 <27 <27 <27 <27 <27 180 <27 <27 180 SB4AA1-0.5 10b SB4 AA 7/26/2018 0.5 <5.4 <5.4 <5.4 <5.4 <5.4 <5.4 55 <5.4 <5.4 55 SB4AA1-1 10b SB4 AA 7/26/2018 1 <0.054 <0.054 <0.054 <0.054 <0.054 <0.054 0.24 <0.054 <0.054 0.24 SB4AA2-0.5 10b SB4 AA2 7/26/2018 0.5 <5.2 <5.2 <5.2 <5.2 <5.2 <5.2 50 <5.2 <5.2 50 SB4AA2-1 10b SB4 AA2 7/26/2018 1 <0.53 <0.53 <0.53 <0.53 0.54 <0.53 2.4 <0.53 <0.53 2.9 SB4AA7-0.5 10b SB4 AA7 9/27/2018 0.5 <2.5 <2.5 <2.5 <2.5 <2.5 <2.5 13 13 SB4AA7-1.0 10b SB4 AA7 9/27/2018 1 <0.052 <0.052 <0.052 <0.052 <0.052 <0.052 <0.052 All ND SB4AA8-0.5 10b SB4 AA8 9/27/2018 0.5 <0.51 <0.51 <0.51 <0.51 <0.51 <0.51 4.2 4.2 SB4AA8-1.0 10b SB4 AA8 9/27/2018 1 <0.052 <0.052 <0.052 <0.052 <0.052 <0.052 <0.052 All ND SB4GG-2.5 10b SB4 GG 7/26/2018 2.5 <0.055 <0.055 <0.055 <0.055 <0.055 <0.055 <0.055 <0.055 <0.055 All ND SB4KK1-1 10b SB4 KK 7/26/2018 1 <5.5 <5.5 <5.5 <5.5 <5.5 <5.5 110 <5.5 <5.5 110 SB4KK-2.5 10b SB4 KK 7/26/2018 2.5 <0.054 <0.054 <0.054 <0.054 <0.054 <0.054 <0.054 <0.054 <0.054 All ND SB4KK1-2.5 10b SB4 KK1 7/26/2018 2.5 <0.055 <0.055 <0.055 <0.055 <0.055 <0.055 <0.055 <0.055 <0.055 All ND SB4KK2-1 10b SB4 KK2 7/26/2018 1 <5.4 <5.4 <5.4 <5.4 <5.4 <5.4 27 <5.4 <5.4 27 SB4KK3-1 10b SB4 KK3 7/26/2018 1 <5.4 <5.4 <5.4 <5.4 <5.4 <5.4 21 <5.4 <5.4 21 SB4AA3-0.5 10b SB4 AA3 8/3/2018 0.5 <0.26 <0.26 <0.26 <0.26 <0.26 <0.26 1.7 <0.26 <0.26 1.7 SB4AA3-1 10b SB4 AA3 8/3/2018 1 <0.054 <0.054 <0.054 <0.054 <0.054 <0.054 0.85 <0.054 <0.054 0.85 SB4AA4-0.5 10b SB4 AA4 8/3/2018 0.5 <25 <25 <25 <25 <25 <25 140 <25 <25 140 SB4AA4-1 10b SB4 AA4 8/3/2018 1 <0.053 <0.053 <0.053 <0.053 <0.053 <0.053 0.058 <0.053 <0.053 0.058 SB4AA5-0.5 10b SB4 AA5 8/3/2018 0.5 <0.051 <0.051 <0.051 <0.051 <0.051 <0.051 0.1 <0.051 <0.051 0.1 SB4AA5-1 10b SB4 AA5 8/3/2018 1 <0.052 <0.052 <0.052 <0.052 <0.052 <0.052 <0.052 <0.052 <0.052 All ND SB4AA6-0.5 10b SB4 AA6 8/3/2018 0.5 <0.055 <0.055 <0.055 <0.055 <0.055 <0.055 0.072 <0.055 <0.055 0.072 SB4AA6-1 10b SB4 AA6 8/3/2018 1 <0.055 <0.055 <0.055 <0.055 <0.055 <0.055 0.31 <0.055 <0.055 0.31 SB4KK4-1 10b SB4 KK4 8/3/2018 1 <27 <27 <27 <27 <27 <27 170 <27 <27 170 SB4KK4-2.5 10b SB4 KK4 8/3/2018 2.5 <0.05 <0.05 <0.05 <0.05 <0.05 <0.05 0.06 <0.05 <0.05 0.06 SBKK5-1 10b SB4 KK5 8/3/2018 1 <54 <54 <54 <54 70 <54 140 <54 <54 210 SB4KK5-2.5 10b SB4 KK5 8/3/2018 2.5 <0.056 <0.056 <0.056 <0.056 <0.056 <0.056 0.21 <0.056 <0.056 0.21 SB4KK6-0.5 10b SB4 KK6 9/27/2018 0.5 <0.5 <0.5 <0.5 <0.5 4.5 2.9 2.1 9.5 SB4KK6-1.0 10b SB4 KK6 9/27/2018 1 <2.7 <2.7 <2.7 <2.7 <2.7 <2.7 11 11 page 7 of 9
PCB-1016 PCB-1221 PCB-1232 PCB-1242 PCB-1248 PCB-1254 PCB-1260 Total PCBs
depth
(feet bgs)
EPA Method 8082 (mg/kg)
Table 1
Polychlorinated Biphenyls (PCBs) in Soil
Riverside Scrap Iron & Metal Site
Riverside, California
Sample/
Boring
ID
Area Sample
Location
2018 Investigation
Step-Out Sample
Designation or
Information
Sample Date
Remedial Action Plan
SB4KK7-0.5 10b SB4 KK7 9/27/2018 0.5 <0.25 <0.25 <0.25 <0.25 1.6 0.81 0.69 3.1 SB4KK7-1.0 10b SB4 KK7 9/27/2018 1 <5.4 <5.4 <5.4 <5.4 19 <5.4 87 110 SB4KK7-2.5 10b SB4 KK7 9/27/2018 2.5 <0.056 <0.056 <0.056 <0.056 <0.056 <0.056 <0.056 <0.056 <0.056 All ND SB4KK8-0.5 10b SB4 KK8 9/27/2018 0.5 <0.5 <0.5 <0.5 <0.5 2.2 1.1 0.84 4.1 SB4KK8-1.0 10b SB4 KK8 9/27/2018 1 <5.4 <5.4 <5.4 <5.4 <5.4 <5.4 76 76 SB4KK9-0.5 10b SB4 KK9 9/27/2018 0.5 <0.26 <0.26 <0.26 <0.26 1.5 0.39 <0.26 2.1 SB4KK9-1.0 10b SB4 KK9 9/27/2018 1 <0.055 <0.055 <0.055 <0.055 <0.055 <0.055 0.88 0.88 SB4KK11-0.5 10b SB4 KK11 9/27/2018 0.5 <0.5 <0.5 <0.5 <0.5 30 7.7 4 <0.5 <0.5 41 SB4KK11-1.0 10b SB4 KK11 9/27/2018 1 <0.54 <0.54 <0.54 <0.54 <0.54 <0.54 76 <0.54 <0.54 76 SB4KK11-2.5 10b SB4 KK11 9/27/2018 2.5 <0.057 <0.057 <0.057 <0.057 <0.057 <0.057 <0.057 <0.057 <0.057 All ND SB4KK12-0.5 10b SB4 KK12 9/27/2018 0.5 <0.054 <0.054 <0.054 <0.054 <0.054 <0.054 <0.054 <0.054 <0.054 All ND SB4KK12-1.0 10b SB4 KK12 9/27/2018 1 <0.055 <0.055 <0.055 <0.055 <0.055 <0.055 <0.055 <0.055 <0.055 All ND SB4KK12-2.5 10b SB4 KK12 9/27/2018 2.5 <0.055 <0.055 <0.055 <0.055 <0.055 <0.055 <0.055 <0.055 <0.055 All ND SB4KK13-0.5 10b SB4 KK13 9/27/2018 0.5 <0.05 <0.05 <0.05 <0.05 0.45 0.43 0.37 <0.05 <0.05 1.3 SB4KK13-1.0 10b SB4 KK13 9/27/2018 1 <2.8 <2.8 <2.8 <2.8 18 <2.8 59 <2.8 <2.8 77 SB4KK13-2.5 10b SB4 KK13 9/27/2018 2.5 <0.054 <0.054 <0.054 <0.054 <0.054 <0.054 <0.054 <0.054 <0.054 All ND SB4KK14-0.5 10b SB4 KK14 9/27/2018 0.5 <0.05 <0.05 <0.05 <0.05 3.4 3 3.2 <0.05 <0.05 9.6 SB4KK14-1.0 10b SB4 KK14 9/27/2018 1 <0.055 <0.055 <0.055 <0.055 <0.055 <0.055 13 <0.055 <0.055 13 SB4KK14-2.5 10b SB4 KK14 9/27/2018 2.5 <0.055 <0.055 <0.055 <0.055 <0.055 <0.055 <0.055 <0.055 <0.055 All ND SB4KK17-0.5 10b SB4 KK17 12/20/2018 0.5 <0.055 <0.055 <0.055 <0.055 0.083 0.088 0.08 <0.055 <0.055 0.25 SB4KK17-1 10b SB4 KK17 12/20/2018 1 <0.055 <0.055 <0.055 <0.055 <0.055 <0.055 <0.055 <0.055 <0.055 All ND SB4KK18-0.5 10b SB4 KK18 12/20/2018 0.5 <0.055 <0.055 <0.055 <0.055 <0.055 <0.055 12 <0.055 <0.055 12 SB4KK18-1 10b SB4 KK18 12/20/2018 1 <0.055 <0.055 <0.055 <0.055 <0.055 <0.055 0.53 <0.055 <0.055 0.53 SB4KK19-0.5 10b SB4 KK19 12/20/2018 0.5 <0.055 <0.055 <0.055 <0.055 1.9 2.8 2.9 <0.055 <0.055 7.6 SB4KK19-1 10b SB4 KK19 12/20/2018 1 <0.055 <0.055 <0.055 <0.055 110 <0.055 7 <0.055 <0.055 120 SB4KK20-0.5 10b SB4 KK20 12/20/2018 0.5 <0.055 <0.055 <0.055 <0.055 <0.055 <0.055 11 <0.055 <0.055 11 SB4KK20-1 10b SB4 KK20 12/20/2018 1 <0.055 <0.055 <0.055 <0.055 90 <0.055 4.5 <0.055 <0.055 95 SB4KK19-2.5 10b SB4 KK19 12/20/2018 2.5 <0.056 <0.056 <0.056 <0.056 0.12 <0.056 <0.056 <0.056 <0.056 0.12 SB4KK19-5 10b SB4 KK19 12/20/2018 5 <0.056 <0.056 <0.056 <0.056 0.26 <0.056 0.12 <0.056 <0.056 0.38 SB4KK20-2.5 10b SB4 KK20 12/20/2018 2.5 <0.056 <0.056 <0.056 <0.056 <0.056 <0.056 <0.056 <0.056 <0.056 All ND SB4KK20-5 10b SB4 KK20 12/20/2018 5 <0.056 <0.056 <0.056 <0.056 <0.056 <0.056 <0.056 <0.056 <0.056 All ND SB4KK24-0.5 10b SB4 KK24 12/20/2018 0.5 <0.056 <0.056 <0.056 <0.056 33 <0.056 1.8 <0.056 <0.056 35 SB4KK24-1 10b SB4 KK24 12/20/2018 1 <0.056 <0.056 <0.056 <0.056 30 <0.056 1.7 <0.056 <0.056 32 SB4KK24-2.5 10b SB4 KK24 12/20/2018 2.5 <0.056 <0.056 <0.056 <0.056 0.32 <0.056 0.058 <0.056 <0.056 0.37 SB4KK24-5 10b SB4 KK24 12/20/2018 5 <0.056 <0.056 <0.056 <0.056 0.07 <0.056 <0.056 <0.056 <0.056 0.07 SB4KK25-0.5 10b SB4 KK25 12/20/2018 0.5 <0.056 <0.056 <0.056 <0.056 0.83 <0.056 3.4 <0.056 <0.056 4.3 SB4KK25-1 10b SB4 KK25 12/20/2018 1 <0.056 <0.056 <0.056 <0.056 7.5 <0.056 0.28 <0.056 <0.056 7.8 SB4KK25-2.5 10b SB4 KK25 12/20/2018 2.5 <0.056 <0.056 <0.056 <0.056 <0.056 <0.056 <0.056 <0.056 <0.056 All ND SB4KK25-5 10b SB4 KK25 12/20/2018 5 <0.056 <0.056 <0.056 <0.056 <0.056 <0.056 <0.056 <0.056 <0.056 All ND SB4KK26-0.5 10b SB4 KK26 12/20/2018 0.5 <0.056 <0.056 <0.056 <0.056 0.91 3.1 2.5 <0.056 <0.056 6.5 SB4KK26-1 10b SB4 KK26 12/20/2018 1 <0.056 <0.056 <0.056 <0.056 87 <0.056 6.4 <0.056 <0.056 93 SB4KK26-2.5 10b SB4 KK26 12/20/2018 2.5 <0.056 <0.056 <0.056 <0.056 <0.056 <0.056 <0.056 <0.056 <0.056 All ND SB4KK26-5 10b SB4 KK26 12/20/2018 5 <0.056 <0.056 <0.056 <0.056 <0.056 <0.056 <0.056 <0.056 <0.056 All ND page 8 of 9
PCB-1016 PCB-1221 PCB-1232 PCB-1242 PCB-1248 PCB-1254 PCB-1260 Total PCBs
depth
(feet bgs)
EPA Method 8082 (mg/kg)
Table 1
Polychlorinated Biphenyls (PCBs) in Soil
Riverside Scrap Iron & Metal Site
Riverside, California
Sample/
Boring
ID
Area Sample
Location
2018 Investigation
Step-Out Sample
Designation or
Information
Sample Date
Remedial Action Plan

A12-SB1 12 SB1 NA 1/31/2011 1 <0.05 <0.1 <0.05 <0.05 <0.05 <0.05 23 23 A12-SB2 12 SB2 NA 1/31/2011 1 <0.05 <0.1 <0.05 <0.05 <0.05 <0.05 <0.05 All ND A12-SB3 12 SB3 NA 1/31/2011 1 <0.05 <0.1 <0.05 <0.05 0.123 <0.05 <0.05 0.123 A12-SB4 12 SB4 NA 1/31/2011 1 <0.05 <0.1 <0.05 <0.05 0.205 0.12 <0.05 0.325 A12-SB5 12 SB5 NA 1/31/2011 1 <0.05 <0.1 <0.05 <0.05 <0.05 <0.05 6.2 6.2 S10 12 S10 NA 8/11/2015 0.25 <0.02UJ <0.02UJ <0.02UJ 1.4J <0.02UJ 4.3J 3.50J 9.2 S10 12 S10 NA 8/11/2015 2.5 <0.02 <0.02 <0.02 <0.02 <0.02 <0.02 <0.02 All ND S7 12 S7 NA 8/11/2015 2.5 <0.02 <0.02 <0.02 <0.02 <0.02 <0.02 <0.02 All ND NS16 12 NS16 NA 8/13/2015 2.5 <0.02 <0.02 <0.02 <0.02 <0.02 <0.02 <0.02 All ND A13-SB1 13 SB1 NA 1/31/2011 1 <0.05 <0.1 <0.05 <0.05 <0.05 0.425 <0.05 0.425 A13-SB2 13 SB2 NA 1/31/2011 1 <0.05 <0.1 <0.05 <0.05 <0.05 <0.05 <0.05 ALL ND A13-SB3 13 SB3 NA 2/3/2011 1 <0.05 <0.1 <0.05 <0.05 <0.05 <0.05 <0.05 ALL ND Notes and Data Qualifiers
USEPA Region IX Regional Screening Levels (RSLs), June 2015, screening levels for industrial soil and residential soil.

J = The analyte was detected at a concentration above the method detection limit, but below the reporting limit and is an approximate concentration of the analyte in the sample.

J-flagged results are included in the calculation of "Total PCBs" The following PCB Arochlors were not detected in any sample above laboratory reporting limits: PCB-1016, PCB-1232, PCB-1262, and PCB-1268.

Abbreviations
bgs = Below ground surface
NA = Not applicable to 2018 investigation
< = Not detected at the reporting limit shown
PCBs = Polychlorinated biphenyls
RSL = Regional soil screening level
USEPA = United States Environmental Protection Agency
mg/kg = milligrams per kilogram
Note that some Aroclor's with higher concentrations required dilution to report within calibration range, which resulted in elevated laboratory reporting limits. During excavation confirmation sampling activities, chain-of-custody instructions will note to report each Arochlor at the lowest dilution possible that either has a reportable result or ND at the applicable reporting limit.

Area 12
Area 13
page 9 of 9
GSI Job No.: 6239
Former Riverside Scrap Iron & Metal Property Response Plan APPENDIX G.
2023 Soil Vapor Investigation Reports

SOIL VAPOR INVESTIGATION
REPORT

FORMER RIVERSIDE SCRAP IRON & METAL PROPERTY
2993 6th Street
Riverside, California 92507
Department of Toxic Substances Control Docket No HAS-FY21/22-032

Issued: January 17, 2023

Prepared for: IRON LOFTS LLC
1201 Dove Street, Suite 520
Newport Beach, California 92660

Prepared by: GSI ENVIRONMENTAL INC.
19200 Von Karman Avenue, Suite 800
Irvine, California 92612
949.679.1070
www.gsienv.com

SOIL VAPOR INVESTIGATION REPORT

FORMER RIVERSIDE SCRAP IRON & METAL PROPERTY
2993 6th Street
Riverside, California 92507
Department of Toxic Substances Control Docket No HAS-FY21/22-032

This Soil Vapor Investigation Report was prepared by the staff of GSI Environmental Inc., under the supervision of the Engineer(s) and/or Geologist(s) whose signatures appear hereon.

The findings, recommendations, specifications, or professional opinions were prepared in accordance with generally accepted professional engineering and/or geologic practice. No warranty is expressed or implied.

Issued: January 17, 2023

Timothy F. Wood, PG, CHG
Vice President & Principal Geologist

Peter Scaramella
Senior Risk Assessor

Samantha Curtis, PG
Senior Geologist

GSI Job No.: 6239
Issued: January 17, 2023

SOIL VAPOR INVESTIGATION REPORT
Former Riverside Scrap Iron & Metal Property
2993 6th Street
Riverside, California 92507

TABLE OF CONTENTS

Former Riverside Scrap Iron & Metal Property i Soil Vapor Investigation Report

1.0 INTRODUCTION ................................................................................................................. 1

2.0 SITE DESCRIPTION ............................................................................................................ 1

2.1 Current and Historical Uses .......................................................................................... 1

2.2 Site Geology and Hydrogeology .................................................................................... 1

3.0 SCOPE OF WORK .............................................................................................................. 2

3.1 Pre-field Activities .......................................................................................................... 2

3.2 Soil Vapor Probe Installation ......................................................................................... 3

3.3 Soil Vapor Sampling and Analysis ................................................................................. 3

3.4 Equipment Decontamination ......................................................................................... 4

3.5 Investigation Derived Wastes ........................................................................................ 4

4.0 SOIL VAPOR SAMPLE RESULTS ...................................................................................... 4

4.1 Soil Lithology ................................................................................................................. 4

4.2 Data Quality Summary .................................................................................................. 4

4.3 Soil Vapor Results ......................................................................................................... 5

5.0 SUMMARY AND CONCLUSIONS ....................................................................................... 6

6.0 REFERENCES .................................................................................................................... 7

TABLES
Table 1. Analytical Results for Volatile Organic Compounds in Soil Vapor Samples

FIGURES
Figure 1. Site Location Map
Figure 2. Site Map with Sample Locations
Figure 3. PCE and TCE Concentrations in Soil Vapor (µg/m3)

APPENDICES
Appendix A. Analytical Laboratory Reports – Soil Vapor
Appendix B. Boring Logs
Appendix C. Duplicate Soil Vapor Sample Evaluation
Appendix D. Soil Vapor Purge Volumes
Appendix E. Historical Soil Vapor Data

GSI Job No.: 6239
Issued: January 17, 2023

Former Riverside Scrap Iron & Metal Property

1 Soil Vapor Investigation Report

SOIL VAPOR INVESTIGATION REPORT
Former Riverside Scrap Iron & Metal Property
2993 6th Street
Riverside, California 92507

1.0 I NTRODUCTION
On behalf of Iron Lofts LLC (Iron Lofts), GSI Environmental Inc. (GSI) has prepared this Soil Vapor Investigation Report (SVI Report) for the former Riverside Scrap Iron & Metal (RSIM) property located at 2993 6th Street in Riverside, California (the Site; Figures 1 and 2).

The Site has a 45-year history of use as a scrap metal recycling facility and is located in a mixed- use area that is adjoined by residential and commercial properties. Redevelopment plans for the Site are to construct a multi-family, multi-story residential building development, similar to the recently constructed residential development located adjacent, across Mission Inn Avenue, to the south of the Site.

In 2015 , AMEC Foster Wheeler conducted a soil vapor investigation at the Site, and results identified VOCs in soil vapor at concentrations above residential screening levels (GSI, 2022).

The objective of the work summarized in this SVI Report is to further evaluate PCE and TCE in soil vapor and provide the additional assessment data required to support the planned multifamily redevelopment planning, design, and regulatory oversight, and for the evaluation of unrestricted Site use.

2.0 SITE DESCRIPTION
The Site is approximately 7 acres in size and is identified as “light industrial” by the Riverside County Assessor’s Office. Surrounding properties are mixed commercial and residential. The Site is located within the former Marketplace Brownfields Study Area in the City of Riverside, bound by Commerce Street to the northwest, Mission Inn Avenue and 7th Street to the southwest, and 4th Street to the northeast. The Site is being planned for redevelopment for multi -family residential use, similar to surrounding recent redevelopment projects. The current layout of the Site is shown on Figure 2. Two existing historic buildings (“Buildings of Merit”) with crawl spaces remain at the Site (approximately 1,200 and 5,000 square feet) and will be repurposed for use as amenity space (i.e., gymnasium, club room, co-working space).

2.1 Current and Historical Uses
The Site was used as a scrap metal recycling yard for over 45 years and formerly maintained underground and aboveground storage tanks on the western portion of the Site that were used to store and dispense fuel and oil. The scrap metal and recycling business ceased operations in 2015. By August 2015, the Site had been cleared of utilities and most mixed trash, debris and scrap metal, and currently consists mostly of unpaved bare earth and paved surfaces with some remaining debris. Surrounding land uses to the north and west are primarily commercial.

Residential housing is located along the eastern border of the Site and across Mission Inn Avenue to the south.

2.2 Site Geology and Hydrogeology
The Site is located in the Riverside- Arlington Subbasin of the Upper Santa Ana River Groundwater Basin and within the Peninsular Ranges Geomorphic Province of California. The subbasin is bounded by the impermeable rocks on the south by Arlington Mountain, on the southeast by the Box Springs Mountains, on the northwest by the La Sierra Heights and Mount Rubidoux, and on the north by the Jurupa Mountains. The northeast boundary is defined as the GSI Job No.: 6239
Issued: January 17, 2023

Former Riverside Scrap Iron & Metal Property

2 Soil Vapor Investigation Report

Rialto-Colton fault and a portion of the groundwater divide beneath the city of Bloomington and the Santa Ana River flows over the northern portion of the subbasin (Department of Water Resources [DWR], 2004).

Groundwater in the subbasin is dominantly found in young Quaternary-aged alluvial deposits from the lateral migration of the Santa Ana River over time and consist chiefly of sand, gravel, silt, and clay. The geology in the surrounding mountains and basement rock consist s of Quaternary alluvium, Pleistocene nonmarine, and Mesozoic granitic rocks (California Division of Mines and Geology [CDMG], 1965). Based on the drilling logs provided in AMEC’s 2015 Soil and Soil Vapor Investigation, soils beneath the Site consist primarily of silty sand and sandy silt with occasional thin layers of clay from near surface to 20 feet bgs, the maximum depth of exploration (AMEC, 2015).

In December 2009, the depth to groundwater ranged from 114 to 125 feet bgs with a
southwestern groundwater gradient direction at the former Ken’s Arco property, located approximately 650 feet southeast of the Site at 2871 University Avenue (as reported by Pacific Edge Engineering, Inc. and referenced in AMEC’s 2015 Soil and Soil Vapor Investigation). Based on the general drought conditions since this measurement was taken, currently groundwater levels would be expected to be deeper than reported in December 2009.

3.0 SCOPE OF WORK
Soil vapor sample locations were selected to provide Site coverage and target historical Site features and are presented in Figure 2. Soil vapor probe installation and sampling was performed in accordance with the Cal-EPA July 2015 Advisory for Active Soil Gas Investigations (Advisory).

Soil vapor probes were installed at 21 locations on November 3, 4, and 7, 2022, and 47 soil vapor samples were collected on November 16, 2022 from the following depths:
• 5 feet: VP-1 through VP-21 (21 locations)
• 13 to 15 feet: VP-1 through VP-14 and VP-16 through VP-21 (20 locations) • 22 to 30 feet: VP-1, VP-9, VP-12, VP-14, VP-19, and VP-20 (6 locations) Soil samples were not collected during drilling. At each soil vapor sample location, the recovered soil core was screened for organic vapors using a photoionization detector (PID). No elevated PID readings or stained soil was observed.

3.1 Pre-field Activities
Prior to the sampling activities, the Site-Specific Health and Safety Plan (HASP) was updated in accordance with the requirements of the State of California General Industry Safety Order 5192 and Title 29 of the Code of Federal Regulations, Section 1910.120. The HASP was kept on-Site during field activities. P roposed investigation locations were marked by GSI, and Underground Services Alert (USA) was contacted a minimum of two full working days prior to initiating the field activities. In addition, GSI retained a private geophysical subcontractor to perform utility locating services to assess for the presence of underground utilities and other potential subsurface obstructions in the vicinity of the proposed investigation locations.

GSI Job No.: 6239
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Former Riverside Scrap Iron & Metal Property

3 Soil Vapor Investigation Report

3.2 Soil Vapor Probe Installation
Soil vapor probes were installed at 21 locations identified on Figure 2. The probe locations included the following:
• 1 single probe set at 5 feet bgs;
• 14 dual nested probes (probes at 5 and 15 feet bgs); and • 6 triple nested probes (probes at 5, 15, and approximately 30 feet).

Each soil vapor probe location was manually cleared to approximately 1-f oot bgs using a hand auger. Direct push equipment was utilized to initially penetrate through any surface concrete and the boring was advanced from approximately 1-foot bgs to the final borehole depths.

During probe installation, t he proposed 15-foot bgs soil vapor probe installation at VP- 6 was adjusted to 13 feet bgs , and the 30-foot bgs soil vapor probe at VP- 14 was adjusted to 22 feet bgs ,due to refusal during drilling operations. Only one soil vapor probe was installed to 5 feet bgs at VP-15 due to refusal while attempting to reach the target depth of 15.5 feet bgs. The soil vapor probe proposed as VP-22 was not completed due to borehole collapse in soft fill material.

Soil vapor probes were constructed using nominal ¼-inch diameter Nylaflow tubing connected to a porous polyethylene soil vapor sample probe, set within approximately 1 foot of #3 sand placed around the sample probe. A dry bentonite seal of at least 6 inches followed by a cement and bentonite grout seal was placed on top of the sand pack to the ground surface or to the next soil vapor prove interval. The tubing was capped with a vapor -tight two-way valve or cap at the surface to eliminate the potential for barometric pressure f luctuations inducing vapor transport between the subsurface and the atmosphere. The two- way valve or cap was installed in the closed position and allowed equilibration of soil vapor concentrations after installation.

All probe locations were completed as semi-permanent, with probes protected with a plastic bag and covered with a bentonite patch and sand, with a labeled survey flag. The tubing was labeled and color coded at the surface1 to identify the probe location and depth. In addition, the length of the tubing at the surface corresponds to the relative depth of the probe, with the shortest surface tubing corresponding with the shallowest probe, and the longest surface tubing corresponding with the deepest probe.

3.3 Soil Vapor Sampling and Analysis
Soil vapor samples were collected after an equilibration time of more than 48 hours following installation. Prior to the commencement of sampling, shut -in tests w ere conducted on the soil vapor probes. The probe heads were attached to the sampling train assembly of tubing, valves, and fittings and connected to a purge pump. A minimum vacuum of 100 inches of water column (W.C.) w as applied to the sealed sampling train and monitored for at least 1 minute. After a successful shut-in test was completed, the soil vapor probe and sampling train w as purged. A total of 3 purge volumes
were removed from soil vapor probes prior to sampling. Each soil vapor probe was purged at a rate of 200 milliliters per minute (mL/min) and at a vacuum less than of 100 inches W.C. One purge volume is equal to the internal sample tubing volume and volume of stagnant air within the sand pack and dry bentonite layers (assuming 40 percent porosity). During

1 See associated boring logs for color codes.

GSI Job No.: 6239
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Former Riverside Scrap Iron & Metal Property

4 Soil Vapor Investigation Report

purging and sampling, 1,1-difluoroethane (DFA) was applied as a leak-check tracer gas to check for ambient air leaks near the above-ground probe tubing and sampling train.

Following the completion of purging, soil vapor samples were collected into Summa canisters through flow controllers at a rate of approximately 200 mL/min. Duplicate soil vapor samples were collected at a frequency of one per day . In addition, one field quality assurance/quality control sample consisting of an ambient -air blank was collected by drawing ambient air into a Summa canister through an attached sampling train.

Soil vapor samples w ere analyzed for VOCs using United States Environmental Protection Agency (USEPA) Method TO-15.

3.4 Equipment Decontamination
Downhole drilling and sampling equipment was washed with a potable water -detergent solution and rinsed twice with potable water before each use.

3.5 Investigation Derived Wastes
Soil cuttings were left onsite near the boring locations pending Site excavation activities. Minimal decontamination water was produced during the drilling activities and left onsite pending waste characterization for disposal.

4.0 SOIL VAPOR SAMPLE RESULTS
This section presents the results of soil vapor sampling and analysis, including a presentation of the analytical results, and a comparison of analytical results to risk -based screening criteria.

Analytical results for soil vapor samples are presented in Table 1. The analytical laboratory reports for soil vapor samples are presented in Appendix A.

4.1 Soil Lithology
Soil vapor probes were installed at 21 locations in a generally gridded pattern throughout the vacant Site, and recovered soil was observed and described in accordance with the Unified Soil Classification System (USCS). Soil encountered generally consisted of silt with silty sand and/or poorly to well graded sand with silt intervals at greater depths. Soil boring logs are included as Appendix B.

4.2 Data Quality Summary
Analytical results for soil vapor sampling were reviewed to determine the data usability. Each laboratory data package was reviewed consistent with guidance provided by the USEPA. A sample evaluation was completed for primary and duplicate soil vapor samples and is presented in Appendix C. The following quality assurance/quality control (QA/QC) criteria from the analysis of the project samples were reviewed as applicable: sample preservation and holding time compliance, reporting limits and sample dilution, blank sample analysis, surrogate recovery compliance, laboratory control samples, field duplicate samples and use of laboratory data qualifiers. No data qualifiers were applied based on the results of the data validation review.

Field quality control measures included leak testing with DFA and the collection of a split -t duplicate pair of soil vapor samples. The leak test compound DFA was evaluated by comparison to an action level of 10,000 μg/m
3, which is equivalent to 3.7 parts per million by volume (ppmv).

DFA was not detected in any soil vapor samples at a concentration exceeding this action level.

DFA was detected in the soil vapor sample VP-8-5 at 5 feet bgs at a maximum concentration of GSI Job No.: 6239
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5 Soil Vapor Investigation Report

520 μg/m3, which is equivalent to 0.19 ppmv. This low concentration of DFA does not represent an ambient air leak that could affect the soil vapor results.

4.3 Soil Vapor Results
Soil vapor samples were collected at 21 locations from soil vapor probes with inlets installed at depths between 5 and 30 feet bgs in November 2022 (Figure 2).

Analytical results for soil vapor samples are evaluated by comparison to risk -based screening levels for residential and commercial/industrial Site use. Screening levels (SLs) for soil vapor are developed by applying an attenuation factor to screening levels for indoor air:

Soil Vapor Screening Level (SLsv)= SLia
AF
Where:

SLsv = Soil vapor screening level (µg/m3)
SLia = Indoor air screening level (µg/m3)
AF = Attenuation factor (unitless)

For this evaluation, Regional Screening Levels (RSLs) for residential air published by USEPA (2022) and endorsed or modified by the DTSC ( 2022) were selected as the indoor air SLs . Soil vapor SLs were calculated using the default attenuation factors published by DTSC for residential use (0.001 for future r esidential buildings; DTSC, 2011 and 2022); these soil vapor SLs are referred to in this report as the “DTSC AF SLs.” In addition, soil vapor data also are presented in Table 1 with soil vapor SLs calculated using the USEPA default attenuation factor (0.03 for all buildings; USEPA, 2015); these soil vapor SLs are referred to in this report as the “USEPA AF SLs.” Soil vapor data are evaluated by comparison to the DTSC AF SLs and USEPA AF SLs.

As shown in Table 1, 17 VOCs were detected in at least one soil vapor sample. PCE, TCE, chloroform, 1,2-dichloroethane (1,2-DCA), and benzene were the only VOCs detected in at least one soil vapor sample at a concentration exceeding its residential DTSC AF SL, and the results for these VOCs are summarized below:
• PCE was detected in all soil vapor samples collected at concentrations ranging from 8 to 840 µg/m

3. The highest PCE concentrations in soil vapor were observed in the soil vapor samples collected at 30 feet bgs at the southwestern and northeastern property boundary of the southern parcel (720 µg/m3 at VP-1-30, 670 µg/m3 at VP-9-30, and 840 µg/m3 at VP- 19-30) and southeastern property boundary of the central parcel (710 µg/m3 at VP-20-30 and 750 µg/m3 at VP-20-30 Rep). The highest concentrations of PCE identified in soil vapor samples (up to 840 µg/m3) slightly exceed the residential DTSC AF SL of 460 µg/m3. • TCE was detected in 43 of 49 total soil vapor samples at concentrations ranging from 6.4 to 1,700 µg/m3. The highest TCE concentrations in soil vapor were also observed at the same soil vapor samples with the highest PCE concentrations . Specifically, TCE was detected at the highest concentrations in in the soil vapor sample collected at 30 feet bgs at the southwestern and northeastern property boundary of the southern parcel (1 ,700 µg/m3 at VP-1-30, 1700 µg/m3 at VP-9-30, and 1,500 µg/m3 at VP-19-30) and southeastern property boundary of the central parcel (1,600 µg/m3 at VP-20-30 and 1,700 µg/m3 at VP- 20-30 Rep). The highest concentrations of TCE identified in soil vapor samples ( up to 1,700 µg/m3) exceed the residential DTSC AF SL of 480 µg/m3.

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6 Soil Vapor Investigation Report

• Chloroform was detected in sixteen soil vapor samples at concentrations ranging from 5.9 to 34 µg/m3, all of which exceed the residential USEPA AF SL for chloroform of 4.0 µg/m3 but do not exceed the residential DTSC AF SL of 120 µg/m3. • 1,2-DCA was detected in only one soil vapor sample (VP -15-5) at a concentration of 17 µg/m3, which exceeds the residential USEPA AF SL for 1,2-DCA of 3.7 µg/m3 but does not exceed the residential DTSC AF SL of 120 µg/m3.
• Benzene was detected in thirteen soil vapor samples at concentrations ranging from 3.4 to 39 µg/m3, all of which exceed the residential USEPA AF SL for benzene of 3.2 µg/m3 but do not exceed the residential DTSC AF SL of 97 µg/m3.

5.0 SUMMARY AND CONCLUSIONS
Soil vapor sampling was completed at locations throughout the Site in November 2022.

Specifically, 47 primary soil vapor samples (and 2 duplicate soil vapor samples) were collected from 21 locations installed at depths ranging between 5 and 30 feet bgs. The key findings of the soil vapor survey are summarized below:
• PCE and TCE were the primary VOCs detected in soil vapor samples. PCE was detected in every soil vapor sample, but at relatively low concentrations (up to 840 µg/m 3). TCE
was detected less frequently (43 of 49 total samples), but at slightly higher concentrations (up to 1700 µg/m3).
• PCE and TCE concentrations in soil vapor are consistent with an off-site source. o Concentrations increased with depth at all soil vapor sample locations (i.e., higher concentrations were detected in deeper soil vapor samples) with the exception of two locations (VP-4 and VP-5).
o The highest PCE and TCE concentrations in soil vapor were observed from soil vapor samples collected at 30 feet bgs at the southw estern and northeastern property boundary of the southern parcel and southeastern property boundary of the central parcel.
o A source of PCE or TCE to soil vapor was not identified on the Site and t he low concentrations of PCE and TCE detected in soil vapor samples and increasing concentrations with depth are not indicative of an on- Site release. It is possible that the low concentrations are attributed to minor releases associated with historical on-Site operations and/or an off-Site release that is migrating in deeper soil vapor or groundwater to the Site.
• To mitigate potential for PCE and TCE detected in soil vapor to migrate to indoor air, vapor intrusion mitigation systems are recommended for future on-Site buildings. As part of the repurposing of the two existing historic buildings for amenity space, existing crawl spaces will be vented passively, and the structures will be improved and built out, including installation of modern HVAC systems. Following completion of building improvements, indoor air samples will be collected to confirm the effectiveness of the vapor mitigation measures.

GSI Job No.: 6239
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7 Soil Vapor Investigation Report

6.0 REFERENCES
AMEC Foster Wheeler (AMEC), 2015, Additional Phase II Environmental Site Assessment Report, December 9.

Ami Adini & Associates (AA&A), 2011, Phase II Environmental Site Assessment. August 8.

California Environmental Protection Agency, 2015, Advisory – Active Soil Gas Investigations, July
Department of Toxic Substances Control (DTSC), 2011. Guidance for the evaluation and mitigation of subsurface vapor intrusion to indoor air (vapor intrusion guidance). California Environmental Protection Agency. October.

DTSC, 2022, DTSC Vapor Intrusion Advisory, https://dtsc.ca.gov/wp- content/uploads/sites/31/2022/08/Vapor-Intrusion-Update-August-2022-006.pdf, August.

Department of Toxic Substances Control (DTSC), 2022. Human Health Risk Assessment (HHRA) Note 3, HHRA Note 3, DTSC-modified Screening Levels (DTSC-SLs). California Environmental Protection Agency. May.

Hillmann, 2017a, Off-Site Preliminary Environmental Assessment, February 27.

Hillmann, 2017b, Revised Technical Memorandum Workplan for Delineation of RCRA Level PCB-Impacted Soil, October.

United States Environmental Protection Agency (U.S. EPA). 1989. Risk Assessment Guidance for Superfund, Volume 1, Human Health Evaluation Manual (Part A). Interim Final.

EPA/540/I-89/002. December.

United States Environmental Protection Agency (U.S. EPA). 2022. Regional Screening Levels.

November.

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Former Riverside Scrap Iron & Metal Property Soil Vapor Investigation Report

TABLE
Table 1. Analytical Results for Volatile Organic Compounds in Soil Vapor Samples

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Former Riverside Scrap Iron & Metal Property
Riverside, California
Sample Location Sample ID
Probe Depth
(feet bgs) Date Sampled Units
Tetrachloroethene
(PCE)
Trichloroethene
(TCE)
Chloroform
1,1-Dichloroethene
(1,1-DCE)
1,2-Dichloroethane
(1,2-DCA)
Benzene
Ethylbenzene
Toluene
Xylene
1,1,1-Trichloroethane
1,1,2-Trichloro-
trifluoroethane (F113)
1,2,4-
Trimethylbenzene
2-Butanone (MEK)
Carbon disulfide
Dichlorodifluorometha
ne (F12)
Methylene chloride
(Dichloromethane)
Trichloro-
fluoromethane (F11)
1,1-difluoroethane
(DFA) (leak check
compound)
VP-1-5 5 11/16/2022 µg/m3 150 97 <4.9 <4 <4.1 <3.2 <4.4 <3.8 <8.8 <5.5 94 <5 <30 <6.3 <5 <3.5 22 <5.5 VP-1-15 15 11/16/2022 µg/m3 390 680 12 49 <4.1 25 <4.4 6.3 <8.8 <5.5 290 <5 69 69 <5 <3.5 66 <5.5 VP-1-30 30 11/16/2022 µg/m3 720 1700 20 120 <4.1 8.7 <4.4 4.4 <8.8 <5.5 370 <5 54 20 8.5 <3.5 85 <5.5 VP-2-5 5 11/16/2022 µg/m3 110 48 <4.9 <4 <4.1 <3.2 <4.4 <3.8 <8.8 <5.5 72 <5 <30 7.5 <5 <3.5 23 <5.5 VP-2-15 15 11/16/2022 µg/m3 450 510 33 17 <4.1 <3.2 <4.4 <3.8 <8.8 <5.5 210 <5 <30 7.4 8.2 <3.5 56 <5.5 VP-3-5 5 11/16/2022 µg/m3 12 28 11 <4 <4.1 6.7 <4.4 14 <8.8 <5.5 8.3 <5 <30 19 <5 9.1 5.9 14 VP-3-15 15 11/16/2022 µg/m3 240 250 23 <4 <4.1 <3.2 <4.4 <3.8 <8.8 <5.5 140 <5 <30 <6.3 7.9 <3.5 66 <5.5 VP-4-5 5 11/17/2022 µg/m3 35 19 <4.9 <4 <4.1 <3.2 <4.4 11 <8.8 <5.5 15 <5 <30 67 <5 <3.5 64 <5.5 VP-4-15 15 11/17/2022 µg/m3 180 13 <4.9 <4 <4.1 <3.2 <4.4 <3.8 <8.8 <5.5 26 <5 <30 <6.3 <5 <3.5 99 <5.5 VP-5-5 5 11/17/2022 µg/m3 12 180 17 <4 <4.1 6.3 <4.4 23 4.9 <5.5 <7.7 <5 <30 71 <5 26 60 <5.5 VP-5-15 15 11/17/2022 µg/m3 110 11 <4.9 <4 <4.1 <3.2 <4.4 <3.8 <8.8 <5.5 20 <5 <30 <6.3 6.7 <3.5 220 <5.5 VP-6-5 5 11/17/2022 µg/m3 39 <5.5 <4.9 <4 <4.1 <3.2 <4.4 <3.8 <8.8 <5.5 35 <5 <30 <6.3 7.8 <3.5 91 <5.5 VP-6-13 13 11/17/2022 µg/m3 140 32 <4.9 <4 <4.1 <3.2 <4.4 <3.8 <8.8 <5.5 39 <5 <30 73 7.2 <3.5 100 <5.5 VP-7-5 5 11/17/2022 µg/m3 47 14 <4.9 <4 <4.1 <3.2 <4.4 <3.8 <8.8 <5.5 <7.7 <5 <30 <6.3 <5 <3.5 53 <5.5 VP-7-15 15 11/17/2022 µg/m3 210 40 <4.9 <4 <4.1 <3.2 <4.4 <3.8 <8.8 <5.5 26 <5 <30 <6.3 6.1 <3.5 180 <5.5 VP-8-5 5 11/17/2022 µg/m3 30 <5.5 <4.9 <4 <4.1 <3.2 <4.4 <3.8 <8.8 <5.5 <7.7 <5 <30 <6.3 <5 <3.5 14 520 VP-8-15 15 11/17/2022 µg/m3 140 190 <4.9 <4 <4.1 <3.2 <4.4 <3.8 <8.8 <5.5 50 <5 <30 52 6.8 5.3 85 <5.5 VP-9-5 5 11/16/2022 µg/m3 71 17 <4.9 <4 <4.1 <3.2 <4.4 <3.8 <8.8 <5.5 51 <5 <30 15 <5 <3.5 13 <5.5 VP-9-15 15 11/16/2022 µg/m3 250 380 6.4 6.5 <4.1 6.2 <4.4 4.7 <8.8 <5.5 230 <5 40 29 6.8 <3.5 53 <5.5 VP-9-30 30 11/16/2022 µg/m3 670 1700 20 110 <4.1 <3.2 <4.4 <3.8 <8.8 <5.5 370 <5 62 12 8.4 <3.5 86 <5.5 VP-10-5 5 11/16/2022 µg/m3 80 70 <4.9 <4 <4.1 3.5 <4.4 <3.8 <8.8 <5.5 37 <5 <30 8 <5 <3.5 23 <5.5 VP-10-15 15 11/16/2022 µg/m3 270 430 <4.9 17 <4.1 <3.2 <4.4 4.3 <8.8 <5.5 99 <5 <30 13 6.3 <3.5 51 <5.5 VP-11-5 5 11/16/2022 µg/m3 89 29 <4.9 <4 <4.1 <3.2 <4.4 <3.8 <8.8 <5.5 95 <5 <30 <6.3 5.3 <3.5 34 <5.5 VP-11-15 15 11/16/2022 µg/m3 460 770 <4.9 <4 <4.1 <3.2 <4.4 <3.8 <8.8 <5.5 240 <5 <30 <6.3 7.9 <3.5 90 <5.5 VP-12-5 5 11/17/2022 µg/m3 94 <5.5 <4.9 <4 <4.1 <3.2 <4.4 <3.8 <8.8 <5.5 27 <5 <30 <6.3 <5 <3.5 68 <5.5 VP-12-15 15 11/17/2022 µg/m3 210 73 <4.9 <4 <4.1 <3.2 <4.4 <3.8 <8.8 <5.5 50 <5 <30 13 8.7 <3.5 100 <5.5 VP-12-30 30 11/17/2022 µg/m3 330 310 <4.9 <4 <4.1 <3.2 <4.4 <3.8 <8.8 <5.5 79 <5 32 <6.3 10 <3.5 230 <5.5 VP-13-5 5 11/17/2022 µg/m3 40 20 <4.9 <4 <4.1 3.4 <4.4 6.9 <8.8 <5.5 14 <5 <30 32 <5 3.6 180 <5.5 VP-13-15 15 11/17/2022 µg/m3 120 36 <4.9 <4 <4.1 <3.2 <4.4 <3.8 <8.8 <5.5 22 <5 <30 <6.3 8.2 <3.5 410 <5.5 VP-14-5 5 11/17/2022 µg/m3 160 94 5.9 <4 <4.1 15 6.3 77 20.1 <5.5 21 7.9 <30 120 8.4 6.2 200 <5.5 VP-14-15 15 11/17/2022 µg/m3 460 120 <4.9 <4 <4.1 6.5 <4.4 27 23.4 <5.5 23 7.6 <30 <6.3 8.9 3.6 200 <5.5 VP-14-22 22 11/17/2022 µg/m3 570 360 8.5 <4 <4.1 3.8 <4.4 8.7 <8.8 <5.5 51 <5 <30 16 13 <3.5 350 <5.5 VP-15 VP-15-5 5 11/17/2022 µg/m3 14 <5.5 6.9 <4 17 <3.2 <4.4 <3.8 <8.8 9.4 10 <5 <30 13 <5 <3.5 460 <5.5 VP-16-5 5 11/17/2022 µg/m3 97 6.4 <4.9 <4 <4.1 <3.2 <4.4 <3.8 <8.8 <5.5 16 <5 <30 <6.3 <5 <3.5 23 <5.5 VP-16-15 15 11/17/2022 µg/m3 360 190 <4.9 <4 <4.1 <3.2 <4.4 <3.8 <8.8 <5.5 44 <5 <30 <6.3 <5 <3.5 50 <5.5 VP-17-5 5 11/16/2022 µg/m3 76 55 <4.9 <4 <4.1 <3.2 <4.4 6.5 <8.8 <5.5 23 <5 <30 9.3 <5 <3.5 11 <5.5 VP-17-15 15 11/16/2022 µg/m3 180 290 <4.9 <4 <4.1 <3.2 <4.4 6.6 <8.8 <5.5 49 <5 39 11 <5 <3.5 19 <5.5 VP-17-15 Rep 15 11/16/2022 µg/m3 180 300 <4.9 <4 <4.1 <3.2 <4.4 6.7 <8.8 <5.5 51 <5 74 12 <5 <3.5 19 <5.5 VP-18-5 5 11/16/2022 µg/m3 49 7.6 <4.9 <4 <4.1 <3.2 <4.4 4.1 <8.8 <5.5 14 <5 <30 <6.3 <5 <3.5 41 <5.5 VP-18-15 15 11/16/2022 µg/m3 200 110 <4.9 <4 <4.1 <3.2 <4.4 6.6 <8.8 <5.5 43 <5 100 16 <5 <3.5 79 <5.5 VP-19-5 5 11/17/2022 µg/m3 91 41 <4.9 <4 <4.1 8.1 <4.4 6.5 <8.8 <5.5 32 <5 <30 44 <5 <3.5 11 <5.5 VP-19-15 15 11/17/2022 µg/m3 420 380 <4.9 <4 <4.1 4.9 <4.4 10 <8.8 <5.5 100 <5 <30 71 <5 <3.5 52 <5.5 VP-19-30 30 11/17/2022 µg/m3 840 1500 7.5 26 <4.1 <3.2 <4.4 <3.8 <8.8 <5.5 180 <5 <30 <6.3 <5 <3.5 64 <5.5 VP-7
VP-8
VP-9
VP-16
VP-10
VP-11
VP-12
VP-13
VP-14
TABLE 1: Volatile Organic Compounds (VOCs) in Soil Vapor 1 VP-1
VP-18
VP-19
VP-17
VP-2
VP-3
VP-4
VP-5
VP-6
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References:
1 Soil vapor samples collected by H&P Mobile Geochemistry, Inc. (H&P) of Carlsbad, CA into batch-certified, 400 or 450 milliliter summa canisters under the field oversight of GSI Environmental Inc., and analyzed by H&P at a fixed laboratory using USEPA Method TO-15.

USEPA AF SL (AF=0.03)
All Residential Buildings
Department of Toxic Substances Control (DTSC). 2022. Human Health Risk Assessment (HHRA) Note, HERO HHRA Note 3, DTSC-modified Screening Levels (DTSC-SLs). May.

United States Environmental Protection Agency (USEPA). 2022. Regional Screening Levels (RSLs). November. 2 Soil vapor results are compared to soil vapor screening levels generated by applying default attenuation factors (AF) for all buildings (0.03), as published by the USEPA (2015), or for current commercial buildings (0.001), as published by the California Department of Toxic Substances Control (DTSC, 2011) to regional screening levels for indoor air under residential land use published by the USEPA (2022) and modified by the DTSC (2022). 3 Soil vapor results are compared to soil vapor screening levels generated by applying default attenuation factors (AF) for all buildings (0.03), as published by the USEPA (2015), or for current commercial buildings (0.001), as published by the California Department of Toxic Substances Control (DTSC, 2011) to regional screening levels for indoor air under residential land use published by the USEPA (2022) and modified by the DTSC (2022).

California Environmental Protection Agency (Cal/EPA). 2011. Final Guidance for the Evaluation and Mitigation of Subsurface Vapor Intrusion to Indoor Air (Vapor Intrusion Guidance). DTSC. October.

GSI Job No.: 6239

Former Riverside Scrap Iron & Metal Property Soil Vapor Investigation Report

FIGURES
Figure 1. Site Location Map
Figure 2. Site Map with Sample Locations
Figure 3. PCE and TCE Concentrations in Soil Vapor (µg/m3)

GSI Job No.

Issued:

Revised:

Map ID:

Drawn by:

Chk'd by:

Aprv'd by:
0 1.5 30.75
Miles
FIGURE 1
6239
RS6239_SLM
2-Jun-2022
AV

SC SITE LOCATION MAP
Riverside Scrap Iron & Metal
Riverside, California
TFW
£
Reference map provided by Esri, 2022.

SITE

LOCATION
^_
^_
CaliforniaCalifornia
Drawn By:

Chk'd By:

Appv'd By:Map ID:

Issued:

GSI Job No.
#I
#I
%2 %2
%2 %2
%2 %2
#I
%2 %2 %2
#I
%2 #I
#I
%2
%2
%2
!.
%2

MISSION INN AVENUE
6TH STREET
5TH STREET

COMMERCE STREET
VP-1 VP-2 VP-3 VP-4 VP-5
VP-6
VP-7
VP-12
VP-8
VP-9
VP-10 VP-11 VP-13 VP-14 VP-15
VP-16
VP-17 VP-18 VP-19
VP-20
VP-21
Projected Coordinate System
Datum: NAD83
State Plane California Zone VI
Units: Feet

SOIL VAPOR

SAMPLE LOCATIONS
6239 AV
22-Nov-2022
RS6239_SVPNov22
0 10050
SCALE (Feet)
SC
SC
Riverside Scrap Iron & Metal
Riverside, California
q
LEGEND
FIGURE 2
Residential Residential Residential Residential
1) Basemap downloaded from Google Earth Pro dated
October 2016.
2) VP-6 probes were installed at 5' and 13'. VP-14 probes were installed at 5', 15', and 22'.

Notes
Site Boundary
#I 5, 15, and 30 Foot Soil Vapor Probe
%2 5 and 15 Foot Soil Vapor Probe
5 Foot Soil Vapor Probe!.

Drawn By:

Chk'd By:

Appv'd By:Map ID:

Issued:

GSI Job No.
#I
#I
%2 %2
%2 %2
%2 %2
#I
%2 %2 %2
#I
%2 #I
#I
%2
%2
%2
!.
%2

MISSION INN AVENUE
6TH STREET
5TH STREET

PCE AND TCE IN SOIL VAPOR
6239 AV
9-Dec-2022
RS6239_SVP_PCETCE
0 10050
SCALE (Feet)
SC
SC
Riverside Scrap Iron & Metal
Riverside, California
q
LEGEND
FIGURE 3
1) Basemap downloaded from Google Earth Pro dated
October 2016.
2) VP-6 probes were installed at 5' and 13'. VP-14 probes installed at 5', 15', and 22'.
3) Depth = feet below ground surface; < = not detected above the designated laboratory reporting limit; DUP = duplicate sample; PCE = tetrachloroethene; TCE = trichloroethene. 4) Concentrations are in micrograms per cubic meter (µg/m3) Notes
Site Boundary
#I 5, 15, and 30 Foot Soil Vapor Probe
%2 5 and 15 Foot Soil Vapor Probe
5 Foot Soil Vapor Probe!.

Sample ID Date Depth PCE TCE
5 8 <5.5
15 150 <5.511/17/2022VP-21
Sample ID Date Depth PCE TCE
5 91 51
15 450 650
30 710 1600
30 (DUP) 750 1700
11/17/2022VP-20
Sample ID Date Depth PCE TCE
5 91 41
15 420 380
30 840 1500
11/17/2022VP-19
Sample ID Date Depth PCE TCE
5 49 7.6
15 200 11011/16/2022VP-18
Sample ID Date Depth PCE TCE
5 76 55
15 180 290
15 (DUP) 180 300
11/16/2022VP-17
Sample ID Date Depth PCE TCE
5 40 20
15 120 3611/17/2022VP-13
Sample ID Date Depth PCE TCE
5 94 <5.5
15 210 73
30 330 310
11/17/2022VP-12Sample ID Date Depth PCE TCE
5 89 29
15 460 77011/16/2022VP-11
Sample ID Date Depth PCE TCE
5 80 70
15 270 43011/16/2022VP-10
Sample ID Date Depth PCE TCE
5 71 17
15 250 380
30 670 1700
11/16/2022VP-9
Sample ID Date Depth PCE TCE
5 39 <5.5
13 140 3211/17/2022VP-6
Sample ID Date Depth PCE TCE
5 12 180
15 110 1111/17/2022VP-5
Sample ID Date Depth PCE TCE
5 35 19
15 180 1311/17/2022VP-4
Sample ID Date Depth PCE TCE
5 12 28
15 240 25011/16/2022VP-3
Sample ID Date Depth PCE TCE
5 110 48
15 450 510VP-2 11/16/2022
Sample ID Date Depth PCE TCE
5 150 97
15 390 680
30 720 1700
VP-1 11/16/2022
Sample ID Date Depth PCE TCE
5 47 14
15 210 4011/17/2022VP-7
Sample ID Date Depth PCE TCE
5 30 <5.5
15 140 19011/17/2022VP-8
Sample ID Date Depth PCE TCE
VP-15 11/17/2022 5 14 <5.5
Sample ID Date Depth PCE TCE
5 97 6.4
15 360 19011/17/2022VP-16
Sample ID Date Depth PCE TCE
5 160 94
15 460 120
22 570 360
11/17/2022VP-14
GSI Job No.: 6239

Former Riverside Scrap Iron & Metal Property Soil Vapor Investigation Report

GSI Job No.: 6239

Former Riverside Scrap Iron & Metal Property Soil Vapor Investigation Report

APPENDIX A
Analytical Laboratory Reports – Soil Vapor

GSI Environmental, Inc
Irvine, CA 92618
7595 Irvine Center Dr, Ste 250
Samantha Curtis
Enclosed is the analytical report for the above referenced project. The data herein applies to samples as received by H&P Mobile Geochemistry, Inc. on 11/16/2022-1 1/17/2022which were
analyzed in accordance with the attached Chain of Custody record(s).

The results for all sample analyses and required QA/QC analyses are presented in the following sections and summarized in the documents:
• Sample Summary
• Case Narrative (if applicable)
• Sample Results
• Quality Control Summary
• Notes and Definitions / Appendix
• Chain of Custody
• Sampling Logs (if applicable)
Unless otherwise noted, I certify that all analyses were performed and reviewed in compliance with our Quality Systems Manual and Standard Operating Procedures. This report shall not be reproduced, except in full, without the written approval of H&P Mobile Geochemistry, Inc.

We at H&P Mobile Geochemistry, Inc. sincerely appreciate the opportunity to provide analytical services to you on this project. If you have any questions or concerns regarding this analytical report, please contact me at your convenience at 760-804-9678.

Sincerely,
08 December 2022
Lisa Eminhizer
Laboratory Director
H&P Mobile Geochemistry, Inc. is certified under the California ELAP and the National Environmental Laboratory Accreditation Conference (NELAC) for the fields of proficiency and analytes listed on those certificates. H& P is approved as an Environmental Testing Laboratory in accordance with the DoD-ELAP Program and ISO/IEC 17025:2005 programs for the fields of proficiency and analytes included in the certification process and to the extent offered by the accreditation agency . Unless otherwise noted, accreditation certificate numbers, expiration of certificates, and scope of accreditation can be found at: www.handpmg.com/about/certifications. Fields of services and analytes contained in this report that are not listed on the certificates should be considered uncertified or unavailable for certification.

Client Project: 6239 / Riverside
H&P Project: GSI111722-10
Dear Samantha Curtis:

P 1.800.834.9888 / 760.804.9678 F 760.804.9159 W handpmg.com 2470 Impala Drive, Carlsbad, CA 92010 & Field Office - Signal Hill, CA Quality. Accuracy. Experience.

Geochemistry Inc.

Mobile

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Reported:

GSI Environmental, Inc
7595 Irvine Center Dr, Ste 250
GSI1
11722-10
6239 / Riverside
Samantha CurtisIrvine, CA 92618 08-Dec-22 14:54
2470 Impala Drive
Carlsbad, CA 92010
760-804-9678 Phone
760-804-9159 Fax
H&P Mobile
Geochemistry Inc.

Sample ID Laboratory ID Matrix Date Sampled

ANALYTICAL REPORT FOR SAMPLES
Date Received
VP-1-30 E21
1049-01 Vapor 16-Nov-22 16-Nov-22
VP-1-15 E211049-02 Vapor 16-Nov-22 16-Nov-22
VP-1-5 E211049-03 Vapor 16-Nov-22 16-Nov-22
AA E211049-04 Vapor 16-Nov-22 16-Nov-22
VP-9-30 E211049-05 Vapor 16-Nov-22 16-Nov-22
VP-9-15 E211049-06 Vapor 16-Nov-22 16-Nov-22
VP-9-5 E211049-07 Vapor 16-Nov-22 16-Nov-22
VP-2-15 E211049-08 Vapor 16-Nov-22 16-Nov-22
VP-2-5 E211049-09 Vapor 16-Nov-22 16-Nov-22
VP-3-15 E211049-10 Vapor 16-Nov-22 16-Nov-22
VP-3-5 E211049-11 Vapor 16-Nov-22 16-Nov-22
VP-11-15 E211049-12 Vapor 16-Nov-22 16-Nov-22
VP-11-5 E211049-13 Vapor 16-Nov-22 16-Nov-22
VP-10-15 E211049-14 Vapor 16-Nov-22 16-Nov-22
VP-10-5 E211049-15 Vapor 16-Nov-22 16-Nov-22
VP-17-15 E211049-16 Vapor 16-Nov-22 16-Nov-22
VP-17-5 E211049-17 Vapor 16-Nov-22 16-Nov-22
VP-17-5 Rep E211049-18 Vapor 16-Nov-22 16-Nov-22
VP-18-15 E211049-19 Vapor 16-Nov-22 16-Nov-22
VP-18-5 E211049-20 Vapor 16-Nov-22 16-Nov-22
VP-19-30 E211050-01 Vapor 17-Nov-22 17-Nov-22
VP-19-15 E211050-02 Vapor 17-Nov-22 17-Nov-22
VP-19-5 E211050-03 Vapor 17-Nov-22 17-Nov-22
VP-20-30 E211050-04 Vapor 17-Nov-22 17-Nov-22
VP-20-30 Rep E211050-05 Vapor 17-Nov-22 17-Nov-22
VP-20-15 E211050-06 Vapor 17-Nov-22 17-Nov-22
VP-20-5 E211050-07 Vapor 17-Nov-22 17-Nov-22
VP-12-15 E211050-08 Vapor 17-Nov-22 17-Nov-22

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Sample ID Laboratory ID Matrix Date Sampled

ANALYTICAL REPORT FOR SAMPLES
Date Received
VP-12-5 E21
1050-09 Vapor 17-Nov-22 17-Nov-22
VP-12-30 E211050-10 Vapor 17-Nov-22 17-Nov-22
VP-13-15 E211050-11 Vapor 17-Nov-22 17-Nov-22
VP-13-5 E211050-12 Vapor 17-Nov-22 17-Nov-22
VP-14-22 E211050-13 Vapor 17-Nov-22 17-Nov-22
VP-14-15 E211050-14 Vapor 17-Nov-22 17-Nov-22
VP-14-5 E211050-15 Vapor 17-Nov-22 17-Nov-22
VP-4-15 E211050-16 Vapor 17-Nov-22 17-Nov-22
VP-4-5 E211050-17 Vapor 17-Nov-22 17-Nov-22
VP-5-15 E211050-18 Vapor 17-Nov-22 17-Nov-22
VP-5-5 E211050-19 Vapor 17-Nov-22 17-Nov-22
VP-7-15 E211050-20 Vapor 17-Nov-22 17-Nov-22
VP-7-5 E211050-21 Vapor 17-Nov-22 17-Nov-22
VP-6-13 E211050-22 Vapor 17-Nov-22 17-Nov-22
VP-6-5 E211050-23 Vapor 17-Nov-22 17-Nov-22
VP-16-15 E211050-24 Vapor 17-Nov-22 17-Nov-22
VP-16-5 E211050-25 Vapor 17-Nov-22 17-Nov-22
VP-8-15 E211050-26 Vapor 17-Nov-22 17-Nov-22
VP-8-5 E211050-27 Vapor 17-Nov-22 17-Nov-22
VP-15-5 E211050-28 Vapor 17-Nov-22 17-Nov-22
VP-21-15 E211050-29 Vapor 17-Nov-22 17-Nov-22
VP-21-5 E211050-30 Vapor 17-Nov-22 17-Nov-22

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Reported:

Batch EK23015
The percent recoveries for Dichlorodifluoromethane and Chloromethane fell above the method criteria in the continuing calibration verification (CCV). Any results for these analytes, for samples included in this batch, may be biased high.

Batch EL20615
The percent recovery for Hexachlorobutadiene fell below the method criteria in the CCV. Any results for this analyte, for samples included in this batch, may be biased low.

Batch El20716
The percent recoveries for 2-Butanone, 1,2,4-Trichlorobenzene and Hexachlorobutadiene fell below the method criteria in the CCV. Any results for these analytes, for samples included in this batch, may be biased low.

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DETECTIONS SUMMARY
Sample ID: Laboratory ID:

Analyte Result Limit
Units Method
E211049-01VP-1-30
Notes
Reporting
Dichlorodifluoromethane (F12) 8.5 5.0 ug/m3 EPA T
O-15
Chloromethane 3.5 2.1 ug/m3 EPA TO-15
Trichlorofluoromethane (F11) 85 5.6 ug/m3 EPA TO-15
1,1-Dichloroethene 120 4.0 ug/m3 EPA TO-15
1,1,2-Trichlorotrifluoroethane (F113) 370 7.7 ug/m3 EPA TO-15 Carbon disulfide 20 6.3 ug/m3 EPA TO-15
2-Butanone (MEK) 54 30 ug/m3 EPA TO-15
Chloroform 20 4.9 ug/m3 EPA TO-15
Benzene 8.7 3.2 ug/m3 EPA TO-15
Trichloroethene 1700 5.5 ug/m3 EPA TO-15
Toluene 4.4 3.8 ug/m3 EPA TO-15
Tetrachloroethene 720 6.9 ug/m3 EPA TO-15
Sample ID: Laboratory ID:

Analyte Result Limit Units Method
E211049-02VP-1-15
Notes
Reporting
Trichlorofluoromethane (F11) 66 5.6 ug/m3 EPA TO-15
1,1-Dichloroethene 49 4.0 ug/m3 EPA TO-15
1,1,2-Trichlorotrifluoroethane (F113) 290 7.7 ug/m3 EPA TO-15 Carbon disulfide 69 6.3 ug/m3 EPA TO-15
2-Butanone (MEK) 69 30 ug/m3 EPA TO-15
Chloroform 12 4.9 ug/m3 EPA TO-15
Benzene 25 3.2 ug/m3 EPA TO-15
Trichloroethene 680 5.5 ug/m3 EPA TO-15
Toluene 6.3 3.8 ug/m3 EPA TO-15
Tetrachloroethene 390 6.9 ug/m3 EPA TO-15
Sample ID: Laboratory ID:

Analyte Result Limit Units Method
E211049-03VP-1-5
Notes
Reporting
Trichlorofluoromethane (F11) 22 5.6 ug/m3 EPA TO-15
1,1,2-Trichlorotrifluoroethane (F113) 94 7.7 ug/m3 EPA TO-15 Trichloroethene 97 5.5 ug/m3 EPA TO-15
Tetrachloroethene 150 6.9 ug/m3 EPA TO-15

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Reported:

Sample ID: Laboratory ID:

Analyte Result Limit Units
Method
E211049-04AA
Notes
Reporting
No Detections Reported
Sample ID: Laboratory ID:

Analyte Result Limit Units Method
E211049-05VP-9-30
Notes
Reporting
Dichlorodifluoromethane (F12) 8.4 5.0 ug/m3 EP
A TO-15
Trichlorofluoromethane (F11) 86 5.6 ug/m3 EPA TO-15
1,1-Dichloroethene 110 4.0 ug/m3 EPA TO-15
1,1,2-Trichlorotrifluoroethane (F113) 370 7.7 ug/m3 EPA TO-15 Carbon disulfide 12 6.3 ug/m3 EPA TO-15
2-Butanone (MEK) 62 30 ug/m3 EPA TO-15
Chloroform 20 4.9 ug/m3 EPA TO-15
Trichloroethene 1700 5.5 ug/m3 EPA TO-15
Tetrachloroethene 670 6.9 ug/m3 EPA TO-15
Sample ID: Laboratory ID:

Analyte Result Limit Units Method
E211049-06VP-9-15
Notes
Reporting
Dichlorodifluoromethane (F12) 6.8 5.0 ug/m3 EPA TO-15
Trichlorofluoromethane (F11) 53 5.6 ug/m3 EPA TO-15
1,1-Dichloroethene 6.5 4.0 ug/m3 EPA TO-15
1,1,2-Trichlorotrifluoroethane (F113) 230 7.7 ug/m3 EPA TO-15 Carbon disulfide 29 6.3 ug/m3 EPA TO-15
2-Butanone (MEK) 40 30 ug/m3 EPA TO-15
Chloroform 6.4 4.9 ug/m3 EPA TO-15
Benzene 6.2 3.2 ug/m3 EPA TO-15
Trichloroethene 380 5.5 ug/m3 EPA TO-15
Toluene 4.7 3.8 ug/m3 EPA TO-15
Tetrachloroethene 250 6.9 ug/m3 EPA TO-15
Sample ID: Laboratory ID:

Analyte Result Limit Units Method
E211049-07VP-9-5
Notes
Reporting
Trichlorofluoromethane (F11) 13 5.6 ug/m3 EPA TO-15
1,1,2-Trichlorotrifluoroethane (F113) 51 7.7 ug/m3 EPA TO-15 Carbon disulfide 15 6.3 ug/m3 EPA TO-15
Trichloroethene 17 5.5 ug/m3 EPA TO-15
Tetrachloroethene 71 6.9 ug/m3 EPA TO-15

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Sample ID: Laboratory ID:

Analyte Result Limit Units
Method
E211049-08VP-2-15
Notes
Reporting
Dichlorodifluoromethane (F12) 8.2 5.0 ug/m3 EPA T
O-15
Trichlorofluoromethane (F11) 56 5.6 ug/m3 EPA TO-15
1,1-Dichloroethene 17 4.0 ug/m3 EPA TO-15
1,1,2-Trichlorotrifluoroethane (F113) 210 7.7 ug/m3 EPA TO-15 Carbon disulfide 7.4 6.3 ug/m3 EPA TO-15
Chloroform 33 4.9 ug/m3 EPA TO-15
Trichloroethene 510 5.5 ug/m3 EPA TO-15
Tetrachloroethene 450 6.9 ug/m3 EPA TO-15
Sample ID: Laboratory ID:

Analyte Result Limit Units Method
E211049-09VP-2-5
Notes
Reporting
Trichlorofluoromethane (F11) 23 5.6 ug/m3 EPA TO-15
1,1,2-Trichlorotrifluoroethane (F113) 72 7.7 ug/m3 EPA TO-15 Carbon disulfide 7.5 6.3 ug/m3 EPA TO-15
Trichloroethene 48 5.5 ug/m3 EPA TO-15
Tetrachloroethene 110 6.9 ug/m3 EPA TO-15
Sample ID: Laboratory ID:

Analyte Result Limit Units Method
E211049-10VP-3-15
Notes
Reporting
Dichlorodifluoromethane (F12) 7.9 5.0 ug/m3 EPA TO-15
Trichlorofluoromethane (F11) 66 5.6 ug/m3 EPA TO-15
1,1,2-Trichlorotrifluoroethane (F113) 140 7.7 ug/m3 EPA TO-15 Chloroform 23 4.9 ug/m3 EPA TO-15
Trichloroethene 250 5.5 ug/m3 EPA TO-15
Tetrachloroethene 240 6.9 ug/m3 EPA TO-15
Sample ID: Laboratory ID:

Analyte Result Limit Units Method
E211049-11VP-3-5
Notes
Reporting
1,1-Difluoroethane (LCC) 14 5.5 ug/m3 EPA TO-15
Trichlorofluoromethane (F11) 5.9 5.6 ug/m3 EPA TO-15
1,1,2-Trichlorotrifluoroethane (F113) 8.3 7.7 ug/m3 EPA TO-15 Methylene chloride (Dichloromethane) 9.1 3.5 ug/m3 EPA TO-15 Carbon disulfide 19 6.3 ug/m3 EPA TO-15
Chloroform 11 4.9 ug/m3 EPA TO-15
Benzene 6.7 3.2 ug/m3 EPA TO-15
Trichloroethene 28 5.5 ug/m3 EPA TO-15

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Sample ID: Laboratory ID:

Analyte Result Limit Units
Method
E211049-11VP-3-5
Notes
Reporting
Toluene 14 3.8 ug/m3 EPA T
O-15
Tetrachloroethene 12 6.9 ug/m3 EPA TO-15
Sample ID: Laboratory ID:

Analyte Result Limit Units Method
E211049-12VP-11-15
Notes
Reporting
Dichlorodifluoromethane (F12) 7.9 5.0 ug/m3 EPA TO-15
Trichlorofluoromethane (F11) 90 5.6 ug/m3 EPA TO-15
1,1,2-Trichlorotrifluoroethane (F113) 240 7.7 ug/m3 EPA TO-15 Trichloroethene 770 5.5 ug/m3 EPA TO-15
Tetrachloroethene 460 6.9 ug/m3 EPA TO-15
Sample ID: Laboratory ID:

Analyte Result Limit Units Method
E211049-13VP-11-5
Notes
Reporting
Dichlorodifluoromethane (F12) 5.3 5.0 ug/m3 EPA TO-15
Trichlorofluoromethane (F11) 34 5.6 ug/m3 EPA TO-15
1,1,2-Trichlorotrifluoroethane (F113) 95 7.7 ug/m3 EPA TO-15 Trichloroethene 29 5.5 ug/m3 EPA TO-15
Tetrachloroethene 89 6.9 ug/m3 EPA TO-15
Sample ID: Laboratory ID:

Analyte Result Limit Units Method
E211049-14VP-10-15
Notes
Reporting
Dichlorodifluoromethane (F12) 6.3 5.0 ug/m3 EPA TO-15
Trichlorofluoromethane (F11) 51 5.6 ug/m3 EPA TO-15
1,1-Dichloroethene 17 4.0 ug/m3 EPA TO-15
1,1,2-Trichlorotrifluoroethane (F113) 99 7.7 ug/m3 EPA TO-15 Carbon disulfide 13 6.3 ug/m3 EPA TO-15
Trichloroethene 430 5.5 ug/m3 EPA TO-15
Toluene 4.3 3.8 ug/m3 EPA TO-15
Tetrachloroethene 270 6.9 ug/m3 EPA TO-15
Sample ID: Laboratory ID:

Analyte Result Limit Units Method
E211049-15VP-10-5
Notes
Reporting
Trichlorofluoromethane (F11) 23 5.6 ug/m3 EPA TO-15
1,1,2-Trichlorotrifluoroethane (F113) 37 7.7 ug/m3 EPA TO-15 Carbon disulfide 8.0 6.3 ug/m3 EPA TO-15

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Sample ID: Laboratory ID:

Analyte Result Limit Units
Method
E211049-15VP-10-5
Notes
Reporting
Benzene 3.5 3.2 ug/m3 EPA TO-15
Trichlor
oethene 70 5.5 ug/m3 EPA TO-15
Tetrachloroethene 80 6.9 ug/m3 EPA TO-15
Sample ID: Laboratory ID:

Analyte Result Limit Units Method
E211049-16VP-17-15
Notes
Reporting
Trichlorofluoromethane (F11) 19 5.6 ug/m3 EPA TO-15
1,1,2-Trichlorotrifluoroethane (F113) 49 7.7 ug/m3 EPA TO-15 Carbon disulfide 11 6.3 ug/m3 EPA TO-15
2-Butanone (MEK) 39 30 ug/m3 EPA TO-15
Trichloroethene 290 5.5 ug/m3 EPA TO-15
Toluene 6.6 3.8 ug/m3 EPA TO-15
Tetrachloroethene 180 6.9 ug/m3 EPA TO-15
Sample ID: Laboratory ID:

Analyte Result Limit Units Method
E211049-17VP-17-5
Notes
Reporting
Trichlorofluoromethane (F11) 11 5.6 ug/m3 EPA TO-15
1,1,2-Trichlorotrifluoroethane (F113) 23 7.7 ug/m3 EPA TO-15 Carbon disulfide 9.3 6.3 ug/m3 EPA TO-15
Trichloroethene 55 5.5 ug/m3 EPA TO-15
Toluene 6.5 3.8 ug/m3 EPA TO-15
Tetrachloroethene 76 6.9 ug/m3 EPA TO-15
Sample ID: Laboratory ID:

Analyte Result Limit Units Method
E211049-18VP-17-5 Rep
Notes
Reporting
Trichlorofluoromethane (F11) 19 5.6 ug/m3 EPA TO-15
1,1,2-Trichlorotrifluoroethane (F113) 51 7.7 ug/m3 EPA TO-15 Carbon disulfide 12 6.3 ug/m3 EPA TO-15
2-Butanone (MEK) 74 30 ug/m3 EPA TO-15
Trichloroethene 300 5.5 ug/m3 EPA TO-15
Toluene 6.7 3.8 ug/m3 EPA TO-15
Tetrachloroethene 180 6.9 ug/m3 EPA TO-15
Sample ID: Laboratory ID:

Analyte Result Limit Units Method
E211049-19VP-18-15
Notes
Reporting

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Sample ID: Laboratory ID:

Analyte Result Limit Units
Method
E211049-19VP-18-15
Notes
Reporting
Trichlorofluoromethane (F11) 79 5.6 ug/m3 EPA
TO-15
1,1,2-Trichlorotrifluoroethane (F113) 43 7.7 ug/m3 EPA TO-15 Carbon disulfide 16 6.3 ug/m3 EPA TO-15
2-Butanone (MEK) 100 30 ug/m3 EPA TO-15
Trichloroethene 110 5.5 ug/m3 EPA TO-15
Toluene 6.6 3.8 ug/m3 EPA TO-15
Tetrachloroethene 200 6.9 ug/m3 EPA TO-15
Sample ID: Laboratory ID:

Analyte Result Limit Units Method
E211049-20VP-18-5
Notes
Reporting
Trichlorofluoromethane (F11) 41 5.6 ug/m3 EPA TO-15
1,1,2-Trichlorotrifluoroethane (F113) 14 7.7 ug/m3 EPA TO-15 Trichloroethene 7.6 5.5 ug/m3 EPA TO-15
Toluene 4.1 3.8 ug/m3 EPA TO-15
Tetrachloroethene 49 6.9 ug/m3 EPA TO-15
Sample ID: Laboratory ID:

Analyte Result Limit Units Method
E211050-01VP-19-30
Notes
Reporting
Trichlorofluoromethane (F11) 64 5.6 ug/m3 EPA TO-15
1,1-Dichloroethene 26 4.0 ug/m3 EPA TO-15
1,1,2-Trichlorotrifluoroethane (F113) 180 7.7 ug/m3 EPA TO-15 Chloroform 7.5 4.9 ug/m3 EPA TO-15
Trichloroethene 1500 5.5 ug/m3 EPA TO-15
Tetrachloroethene 840 6.9 ug/m3 EPA TO-15
Sample ID: Laboratory ID:

Analyte Result Limit Units Method
E211050-02VP-19-15
Notes
Reporting
Trichlorofluoromethane (F11) 52 5.6 ug/m3 EPA TO-15
1,1,2-Trichlorotrifluoroethane (F113) 100 7.7 ug/m3 EPA TO-15 Carbon disulfide 71 6.3 ug/m3 EPA TO-15
Benzene 4.9 3.2 ug/m3 EPA TO-15
Trichloroethene 380 5.5 ug/m3 EPA TO-15
Toluene 10 3.8 ug/m3 EPA TO-15
Tetrachloroethene 420 6.9 ug/m3 EPA TO-15

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Sample ID: Laboratory ID:

Analyte Result Limit Units
Method
E211050-03VP-19-5
Notes
Reporting
Trichlorofluoromethane (F11) 11 5.6 ug/m3 EP
A TO-15
1,1,2-Trichlorotrifluoroethane (F113) 32 7.7 ug/m3 EPA TO-15 Carbon disulfide 44 6.3 ug/m3 EPA TO-15
Benzene 8.1 3.2 ug/m3 EPA TO-15
Trichloroethene 41 5.5 ug/m3 EPA TO-15
Toluene 6.5 3.8 ug/m3 EPA TO-15
Tetrachloroethene 91 6.9 ug/m3 EPA TO-15
Sample ID: Laboratory ID:

Analyte Result Limit Units Method
E211050-04VP-20-30
Notes
Reporting
Dichlorodifluoromethane (F12) 8.9 5.0 ug/m3 EPA TO-15
Trichlorofluoromethane (F11) 130 5.6 ug/m3 EPA TO-15
1,1-Dichloroethene 32 4.0 ug/m3 EPA TO-15
1,1,2-Trichlorotrifluoroethane (F113) 130 7.7 ug/m3 EPA TO-15 Chloroform 21 4.9 ug/m3 EPA TO-15
Trichloroethene 1600 5.5 ug/m3 EPA TO-15
Toluene 4.3 3.8 ug/m3 EPA TO-15
Tetrachloroethene 710 6.9 ug/m3 EPA TO-15
Sample ID: Laboratory ID:

Analyte Result Limit Units Method
E211050-05VP-20-30 Rep
Notes
Reporting
Dichlorodifluoromethane (F12) 9.9 5.0 ug/m3 EPA TO-15
Trichlorofluoromethane (F11) 160 5.6 ug/m3 EPA TO-15
1,1-Dichloroethene 31 4.0 ug/m3 EPA TO-15
1,1,2-Trichlorotrifluoroethane (F113) 140 7.7 ug/m3 EPA TO-15 Chloroform 22 4.9 ug/m3 EPA TO-15
Trichloroethene 1700 5.5 ug/m3 EPA TO-15
Toluene 5.0 3.8 ug/m3 EPA TO-15
Tetrachloroethene 750 6.9 ug/m3 EPA TO-15
Sample ID: Laboratory ID:

Analyte Result Limit Units Method
E211050-06VP-20-15
Notes
Reporting
Dichlorodifluoromethane (F12) 6.9 5.0 ug/m3 EPA TO-15
Trichlorofluoromethane (F11) 82 5.6 ug/m3 EPA TO-15
1,1,2-Trichlorotrifluoroethane (F113) 73 7.7 ug/m3 EPA TO-15 Chloroform 6.7 4.9 ug/m3 EPA TO-15

Page 11 of 102 ends

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Sample ID: Laboratory ID:

Analyte Result Limit Units
Method
E211050-06VP-20-15
Notes
Reporting
Trichloroethene 650 5.5 ug/m3 EPA T
O-15
Toluene 4.4 3.8 ug/m3 EPA TO-15
Tetrachloroethene 450 6.9 ug/m3 EPA TO-15
Sample ID: Laboratory ID:

Analyte Result Limit Units Method
E211050-07VP-20-5
Notes
Reporting
Trichlorofluoromethane (F11) 22 5.6 ug/m3 EPA TO-15
1,1,2-Trichlorotrifluoroethane (F113) 19 7.7 ug/m3 EPA TO-15 Trichloroethene 51 5.5 ug/m3 EPA TO-15
Tetrachloroethene 91 6.9 ug/m3 EPA TO-15
Sample ID: Laboratory ID:

Analyte Result Limit Units Method
E211050-08VP-12-15
Notes
Reporting
Dichlorodifluoromethane (F12) 8.7 5.0 ug/m3 EPA TO-15
Trichlorofluoromethane (F11) 100 5.6 ug/m3 EPA TO-15
1,1,2-Trichlorotrifluoroethane (F113) 50 7.7 ug/m3 EPA TO-15 Carbon disulfide 13 6.3 ug/m3 EPA TO-15
Trichloroethene 73 5.5 ug/m3 EPA TO-15
Tetrachloroethene 210 6.9 ug/m3 EPA TO-15
Sample ID: Laboratory ID:

Analyte Result Limit Units Method
E211050-09VP-12-5
Notes
Reporting
Trichlorofluoromethane (F11) 68 5.6 ug/m3 EPA TO-15
1,1,2-Trichlorotrifluoroethane (F113) 27 7.7 ug/m3 EPA TO-15 Tetrachloroethene 94 6.9 ug/m3 EPA TO-15
Sample ID: Laboratory ID:

Analyte Result Limit Units Method
E211050-10VP-12-30
Notes
Reporting
Dichlorodifluoromethane (F12) 10 5.0 ug/m3 EPA TO-15
Trichlorofluoromethane (F11) 230 5.6 ug/m3 EPA TO-15
1,1,2-Trichlorotrifluoroethane (F113) 79 7.7 ug/m3 EPA TO-15 2-Butanone (MEK) 32 30 ug/m3 EPA TO-15
Trichloroethene 310 5.5 ug/m3 EPA TO-15
Tetrachloroethene 330 6.9 ug/m3 EPA TO-15

Page 12 of 102 ends

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Sample ID: Laboratory ID:

Analyte Result Limit Units
Method
E211050-11VP-13-15
Notes
Reporting
Dichlorodifluoromethane (F12) 8.2 5.0 ug/m3 EPA
TO-15
Trichlorofluoromethane (F11) 410 5.6 ug/m3 EPA TO-15
1,1,2-Trichlorotrifluoroethane (F113) 22 7.7 ug/m3 EPA TO-15 Trichloroethene 36 5.5 ug/m3 EPA TO-15
Tetrachloroethene 120 6.9 ug/m3 EPA TO-15
Sample ID: Laboratory ID:

Analyte Result Limit Units Method
E211050-12VP-13-5
Notes
Reporting
Trichlorofluoromethane (F11) 180 5.6 ug/m3 EPA TO-15
1,1,2-Trichlorotrifluoroethane (F113) 14 7.7 ug/m3 EPA TO-15 Methylene chloride (Dichloromethane) 3.6 3.5 ug/m3 EPA TO-15 Carbon disulfide 32 6.3 ug/m3 EPA TO-15
Benzene 3.4 3.2 ug/m3 EPA TO-15
Trichloroethene 20 5.5 ug/m3 EPA TO-15
Toluene 6.9 3.8 ug/m3 EPA TO-15
Tetrachloroethene 40 6.9 ug/m3 EPA TO-15
Sample ID: Laboratory ID:

Analyte Result Limit Units Method
E211050-13VP-14-22
Notes
Reporting
Dichlorodifluoromethane (F12) 13 5.0 ug/m3 EPA TO-15
Trichlorofluoromethane (F11) 350 5.6 ug/m3 EPA TO-15
1,1,2-Trichlorotrifluoroethane (F113) 51 7.7 ug/m3 EPA TO-15 Carbon disulfide 16 6.3 ug/m3 EPA TO-15
Chloroform 8.5 4.9 ug/m3 EPA TO-15
Benzene 3.8 3.2 ug/m3 EPA TO-15
Trichloroethene 360 5.5 ug/m3 EPA TO-15
Toluene 8.7 3.8 ug/m3 EPA TO-15
Tetrachloroethene 570 6.9 ug/m3 EPA TO-15
Sample ID: Laboratory ID:

Analyte Result Limit Units Method
E211050-14VP-14-15
Notes
Reporting
Dichlorodifluoromethane (F12) 8.9 5.0 ug/m3 EPA TO-15
Trichlorofluoromethane (F11) 200 5.6 ug/m3 EPA TO-15
1,1,2-Trichlorotrifluoroethane (F113) 23 7.7 ug/m3 EPA TO-15 Methylene chloride (Dichloromethane) 3.6 3.5 ug/m3 EPA TO-15 Benzene 6.5 3.2 ug/m3 EPA TO-15

Page 13 of 102 ends

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Sample ID: Laboratory ID:

Analyte Result Limit Units
Method
E211050-14VP-14-15
Notes
Reporting
Trichloroethene 120 5.5 ug/m3 EPA T
O-15
Toluene 27 3.8 ug/m3 EPA TO-15
Tetrachloroethene 460 6.9 ug/m3 EPA TO-15
m,p-Xylene 17 8.8 ug/m3 EPA TO-15
o-Xylene 6.4 4.4 ug/m3 EPA TO-15
1,2,4-Trimethylbenzene 7.6 5.0 ug/m3 EPA TO-15
Sample ID: Laboratory ID:

Analyte Result Limit Units Method
E211050-15VP-14-5
Notes
Reporting
Dichlorodifluoromethane (F12) 8.4 5.0 ug/m3 EPA TO-15
Trichlorofluoromethane (F11) 200 5.6 ug/m3 EPA TO-15
1,1,2-Trichlorotrifluoroethane (F113) 21 7.7 ug/m3 EPA TO-15 Methylene chloride (Dichloromethane) 6.2 3.5 ug/m3 EPA TO-15 Carbon disulfide 120 6.3 ug/m3 EPA TO-15
Chloroform 5.9 4.9 ug/m3 EPA TO-15
Benzene 15 3.2 ug/m3 EPA TO-15
Trichloroethene 94 5.5 ug/m3 EPA TO-15
Toluene 77 3.8 ug/m3 EPA TO-15
Tetrachloroethene 160 6.9 ug/m3 EPA TO-15
Ethylbenzene 6.3 4.4 ug/m3 EPA TO-15
m,p-Xylene 13 8.8 ug/m3 EPA TO-15
o-Xylene 7.1 4.4 ug/m3 EPA TO-15
1,2,4-Trimethylbenzene 7.9 5.0 ug/m3 EPA TO-15
Sample ID: Laboratory ID:

Analyte Result Limit Units Method
E211050-16VP-4-15
Notes
Reporting
Trichlorofluoromethane (F11) 99 5.6 ug/m3 EPA TO-15
1,1,2-Trichlorotrifluoroethane (F113) 26 7.7 ug/m3 EPA TO-15 Trichloroethene 13 5.5 ug/m3 EPA TO-15
Tetrachloroethene 180 6.9 ug/m3 EPA TO-15
Sample ID: Laboratory ID:

Analyte Result Limit Units Method
E211050-17VP-4-5
Notes
Reporting
Trichlorofluoromethane (F11) 64 5.6 ug/m3 EPA TO-15
1,1,2-Trichlorotrifluoroethane (F113) 15 7.7 ug/m3 EPA TO-15 Carbon disulfide 67 6.3 ug/m3 EPA TO-15

Page 14 of 102 ends

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Sample ID: Laboratory ID:

Analyte Result Limit Units
Method
E211050-17VP-4-5
Notes
Reporting
Trichloroethene 19 5.5 ug/m3 EPA T
O-15
Toluene 11 3.8 ug/m3 EPA TO-15
Tetrachloroethene 35 6.9 ug/m3 EPA TO-15
Sample ID: Laboratory ID:

Analyte Result Limit Units Method
E211050-18VP-5-15
Notes
Reporting
Dichlorodifluoromethane (F12) 6.7 5.0 ug/m3 EPA TO-15
Trichlorofluoromethane (F11) 220 5.6 ug/m3 EPA TO-15
1,1,2-Trichlorotrifluoroethane (F113) 20 7.7 ug/m3 EPA TO-15 Trichloroethene 11 5.5 ug/m3 EPA TO-15
Tetrachloroethene 110 6.9 ug/m3 EPA TO-15
Sample ID: Laboratory ID:

Analyte Result Limit Units Method
E211050-19VP-5-5
Notes
Reporting
Trichlorofluoromethane (F11) 60 5.6 ug/m3 EPA TO-15
Methylene chloride (Dichloromethane) 26 3.5 ug/m3 EPA TO-15 Carbon disulfide 71 6.3 ug/m3 EPA TO-15
Chloroform 17 4.9 ug/m3 EPA TO-15
Benzene 6.3 3.2 ug/m3 EPA TO-15
Trichloroethene 180 5.5 ug/m3 EPA TO-15
Toluene 23 3.8 ug/m3 EPA TO-15
Tetrachloroethene 12 6.9 ug/m3 EPA TO-15
o-Xylene 4.9 4.4 ug/m3 EPA TO-15 QL-1H
Sample ID: Laboratory ID:

Analyte Result Limit Units Method
E211050-20VP-7-15
Notes
Reporting
Dichlorodifluoromethane (F12) 6.1 5.0 ug/m3 EPA TO-15
Trichlorofluoromethane (F11) 180 5.6 ug/m3 EPA TO-15
1,1,2-Trichlorotrifluoroethane (F113) 26 7.7 ug/m3 EPA TO-15 Trichloroethene 40 5.5 ug/m3 EPA TO-15
Tetrachloroethene 210 6.9 ug/m3 EPA TO-15
Sample ID: Laboratory ID:

Analyte Result Limit Units Method
E211050-21VP-7-5
Notes
Reporting
Trichlorofluoromethane (F11) 53 5.6 ug/m3 EPA TO-15

Page 15 of 102 ends

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Sample ID: Laboratory ID:

Analyte Result Limit Units
Method
E211050-21VP-7-5
Notes
Reporting
Trichloroethene 14 5.5 ug/m3 EPA T
O-15
Tetrachloroethene 47 6.9 ug/m3 EPA TO-15
Sample ID: Laboratory ID:

Analyte Result Limit Units Method
E211050-22VP-6-13
Notes
Reporting
Dichlorodifluoromethane (F12) 7.2 5.0 ug/m3 EPA TO-15
Trichlorofluoromethane (F11) 100 5.6 ug/m3 EPA TO-15
1,1,2-Trichlorotrifluoroethane (F113) 39 7.7 ug/m3 EPA TO-15 Carbon disulfide 73 6.3 ug/m3 EPA TO-15
Trichloroethene 32 5.5 ug/m3 EPA TO-15
Tetrachloroethene 140 6.9 ug/m3 EPA TO-15
Sample ID: Laboratory ID:

Analyte Result Limit Units Method
E211050-23VP-6-5
Notes
Reporting
Dichlorodifluoromethane (F12) 7.8 5.0 ug/m3 EPA TO-15
Trichlorofluoromethane (F11) 91 5.6 ug/m3 EPA TO-15
1,1,2-Trichlorotrifluoroethane (F113) 35 7.7 ug/m3 EPA TO-15 Tetrachloroethene 39 6.9 ug/m3 EPA TO-15
Sample ID: Laboratory ID:

Analyte Result Limit Units Method
E211050-24VP-16-15
Notes
Reporting
Trichlorofluoromethane (F11) 50 5.6 ug/m3 EPA TO-15
1,1,2-Trichlorotrifluoroethane (F113) 44 7.7 ug/m3 EPA TO-15 Trichloroethene 190 5.5 ug/m3 EPA TO-15
Tetrachloroethene 360 6.9 ug/m3 EPA TO-15
Sample ID: Laboratory ID:

Analyte Result Limit Units Method
E211050-25VP-16-5
Notes
Reporting
Trichlorofluoromethane (F11) 23 5.6 ug/m3 EPA TO-15
1,1,2-Trichlorotrifluoroethane (F113) 16 7.7 ug/m3 EPA TO-15 Trichloroethene 6.4 5.5 ug/m3 EPA TO-15
Tetrachloroethene 97 6.9 ug/m3 EPA TO-15

Page 16 of 102 ends

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Sample ID: Laboratory ID:

Analyte Result Limit Units
Method
E211050-26VP-8-15
Notes
Reporting
Dichlorodifluoromethane (F12) 6.8 5.0 ug/m3 EPA T
O-15
Trichlorofluoromethane (F11) 85 5.6 ug/m3 EPA TO-15
1,1,2-Trichlorotrifluoroethane (F113) 50 7.7 ug/m3 EPA TO-15 Methylene chloride (Dichloromethane) 5.3 3.5 ug/m3 EPA TO-15 Carbon disulfide 52 6.3 ug/m3 EPA TO-15
Trichloroethene 190 5.5 ug/m3 EPA TO-15
Tetrachloroethene 140 6.9 ug/m3 EPA TO-15
Sample ID: Laboratory ID:

Analyte Result Limit Units Method
E211050-27VP-8-5
Notes
Reporting
1,1-Difluoroethane (LCC) 520 5.5 ug/m3 EPA TO-15
Trichlorofluoromethane (F11) 14 5.6 ug/m3 EPA TO-15
Tetrachloroethene 30 6.9 ug/m3 EPA TO-15
Sample ID: Laboratory ID:

Analyte Result Limit Units Method
E211050-28VP-15-5
Notes
Reporting
Trichlorofluoromethane (F11) 460 5.6 ug/m3 EPA TO-15
1,1,2-Trichlorotrifluoroethane (F113) 10 7.7 ug/m3 EPA TO-15 Carbon disulfide 13 6.3 ug/m3 EPA TO-15
Chloroform 6.9 4.9 ug/m3 EPA TO-15
1,1,1-Trichloroethane 9.4 5.5 ug/m3 EPA TO-15
1,2-Dichloroethane (EDC) 17 4.1 ug/m3 EPA TO-15
Tetrachloroethene 14 6.9 ug/m3 EPA TO-15
Sample ID: Laboratory ID:

Analyte Result Limit Units Method
E211050-29VP-21-15
Notes
Reporting
Dichlorodifluoromethane (F12) 7.3 5.0 ug/m3 EPA TO-15
Trichlorofluoromethane (F11) 510 5.6 ug/m3 EPA TO-15
1,1,2-Trichlorotrifluoroethane (F113) 39 7.7 ug/m3 EPA TO-15 Tetrachloroethene 150 6.9 ug/m3 EPA TO-15
Sample ID: Laboratory ID:

Analyte Result Limit Units Method
E211050-30VP-21-5
Notes
Reporting
1,1-Difluoroethane (LCC) 11 5.5 ug/m3 EPA TO-15
Trichlorofluoromethane (F11) 160 5.6 ug/m3 EPA TO-15

Page 17 of 102 ends

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Sample ID: Laboratory ID:

Analyte Result Limit Units Method
E211050-30VP-21-5
Notes
Reporting
Carbon disulfide 92 6.3 ug/m3 EPA TO-15
Chloroform 34 4.9
ug/m3 EPA TO-15
Benzene 39 3.2 ug/m3 EPA TO-15
Toluene 10 3.8 ug/m3 EPA TO-15
Tetrachloroethene 8.0 6.9 ug/m3 EPA TO-15

Page 18 of 102 ends

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Reported:

Volatile Organic Compounds by EPA TO-15
H&P Mobile Geochemistry, Inc.

Result Analyte Limit
Reporting
Units
Dilution
Batch Prepared Analyzed Method Notes Factor
VP-1-30 (E211049-01) Vapor Sampled: 16-Nov-22 Received: 16-Nov-22 EPA TO-1530-Nov-22 30-Nov-22ug/m3 EK2301511,1-Difluoroethane (LCC) 5.5ND " " "" "Dichlorodifluoromethane (F12) "5.08.5
" " "" "Chloromethane "2.13.5
"" "" ""Dichlorotetrafluoroethane (F1
14) 7.1ND
"" "" ""Vinyl chloride 2.6ND
"" "" ""Bromomethane 16ND
"" "" ""Chloroethane 8.0ND
" " "" "Trichlorofluoromethane (F11) "5.685
" " "" "1,1-Dichloroethene "4.0120
" " "" "1,1,2-Trichlorotrifluoroethane (F113) "7.7370
"" "" ""Methylene chloride (Dichloromethane) 3.5ND
" " "" "Carbon disulfide "6.320
"" "" ""trans-1,2-Dichloroethene 8.0ND
"" "" ""1,1-Dichloroethane 4.1ND
" " "" "2-Butanone (MEK) "3054
"" "" ""cis-1,2-Dichloroethene 4.0ND
" " "" "Chloroform "4.920
"" "" ""1,1,1-Trichloroethane 5.5ND
"" "" ""1,2-Dichloroethane (EDC) 4.1ND
" " "" "Benzene "3.28.7
"" "" ""Carbon tetrachloride 6.4ND
" " "" "Trichloroethene "5.51700
"" "" ""1,2-Dichloropropane 9.4ND
"" "" ""Bromodichloromethane 6.8ND
"" "" ""cis-1,3-Dichloropropene 4.6ND
"" "" ""4-Methyl-2-pentanone (MIBK) 8.3ND
"" "" ""trans-1,3-Dichloropropene 4.6ND
" " "" "Toluene "3.84.4
"" "" ""1,1,2-Trichloroethane 5.5ND
"" "" ""2-Hexanone (MBK) 8.3ND
"" "" ""Dibromochloromethane 8.6ND
" " "" "Tetrachloroethene "6.9720
"" "" ""1,2-Dibromoethane (EDB) 7.8ND
"" "" ""1,1,1,2-Tetrachloroethane 7.0ND
"" "" ""Chlorobenzene 4.7ND
"" "" ""Ethylbenzene 4.4ND
"" "" ""m,p-Xylene 8.8ND
"" "" ""Styrene 4.3ND

Page 19 of 102 ends

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Reported:

Volatile Organic Compounds by EPA TO-15
H&P Mobile Geochemistry, Inc.

Result Analyte Limit
Reporting
Units
Dilution
Batch Prepared Analyzed Method Notes Factor
VP-1-30 (E211049-01) Vapor Sampled: 16-Nov-22 Received: 16-Nov-22 EPA TO-1530-Nov-22 30-Nov-22ug/m3 EK230151o-Xylene 4.4ND "" "" ""Bromoform 10ND
"" "" ""1,1,2,2-Tetrachloroethane 7.0ND
"" "" ""4-Ethyltoluene 5.0ND
"" "" ""1,3,5-Trimethylbenzene 5.0ND
"" "" ""1,2,4-Trimethylbenzene 5.0ND
"" "" ""1,3-Dichlorobenzene 12ND
"" "" ""1,4-Dichlorobenzene 12ND
"" "" ""1,2-Dichlorobenzene 12ND
"" "" ""1,2,4-T
richlorobenzene 38ND
"" "" ""Hexachlorobutadiene 54ND
" " " "117 % 76-134Surrogate: 1,2-Dichloroethane-d4
" " " "104 % 78-125Surrogate: Toluene-d8
" " " "86.5 % 77-127Surrogate: 4-Bromofluorobenzene
VP-1-15 (E211049-02) Vapor Sampled: 16-Nov-22 Received: 16-Nov-22 EPA TO-1530-Nov-22 30-Nov-22ug/m3 EK2301511,1-Difluoroethane (LCC) 5.5ND "" "" ""Dichlorodifluoromethane (F12) 5.0ND
"" "" ""Chloromethane 2.1ND
"" "" ""Dichlorotetrafluoroethane (F114) 7.1ND
"" "" ""Vinyl chloride 2.6ND
"" "" ""Bromomethane 16ND
"" "" ""Chloroethane 8.0ND
" " "" "Trichlorofluoromethane (F11) "5.666
" " "" "1,1-Dichloroethene "4.049
" " "" "1,1,2-Trichlorotrifluoroethane (F113) "7.7290
"" "" ""Methylene chloride (Dichloromethane) 3.5ND
" " "" "Carbon disulfide "6.369
"" "" ""trans-1,2-Dichloroethene 8.0ND
"" "" ""1,1-Dichloroethane 4.1ND
" " "" "2-Butanone (MEK) "3069
"" "" ""cis-1,2-Dichloroethene 4.0ND
" " "" "Chloroform "4.912
"" "" ""1,1,1-Trichloroethane 5.5ND
"" "" ""1,2-Dichloroethane (EDC) 4.1ND
" " "" "Benzene "3.225
"" "" ""Carbon tetrachloride 6.4ND

Page 20 of 102 ends

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Reported:

Volatile Organic Compounds by EP
A TO-15
H&P Mobile Geochemistry, Inc.

Result Analyte Limit
Reporting
Units
Dilution
Batch Prepared
Analyzed Method Notes Factor
VP-1-15 (E211049-02)
Vapor Sampled: 16-Nov-22 Received: 16-Nov-22
EK23015 30-Nov-22 30-Nov-22ug/m3 1Trichloroethene EPA TO-155.5680 "" "" ""1,2-Dichloropropane 9.4ND
"" "" ""Bromodichloromethane 6.8ND
"" "" ""cis-1,3-Dichloropropene 4.6ND
"" "" ""4-Methyl-2-pentanone (MIBK) 8.3ND
"" "" ""trans-1,3-Dichloropropene 4.6ND
" " "" "Toluene "3.86.3
"" "" ""1,1,2-Trichloroethane 5.5ND
"" "" ""2-Hexanone (MBK) 8.3ND
"" "" ""Dibromochloromethane 8.6ND
" " "" "Tetrachlor
oethene "6.9390
"" "" ""1,2-Dibromoethane (EDB) 7.8ND
"" "" ""1,1,1,2-Tetrachloroethane 7.0ND
"" "" ""Chlorobenzene 4.7ND
"" "" ""Ethylbenzene 4.4ND
"" "" ""m,p-Xylene 8.8ND
"" "" ""Styrene 4.3ND
"" "" ""o-Xylene 4.4ND
"" "" ""Bromoform 10ND
"" "" ""1,1,2,2-Tetrachloroethane 7.0ND
"" "" ""4-Ethyltoluene 5.0ND
"" "" ""1,3,5-Trimethylbenzene 5.0ND
"" "" ""1,2,4-Trimethylbenzene 5.0ND
"" "" ""1,3-Dichlorobenzene 12ND
"" "" ""1,4-Dichlorobenzene 12ND
"" "" ""1,2-Dichlorobenzene 12ND
"" "" ""1,2,4-Trichlorobenzene 38ND
"" "" ""Hexachlorobutadiene 54ND
" " " "118 % 76-134Surrogate: 1,2-Dichloroethane-d4
" " " "105 % 78-125Surrogate: Toluene-d8
" " " "87.6 % 77-127Surrogate: 4-Bromofluorobenzene

Page 21 of 102 ends

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Reported:

Volatile Organic Compounds by EPA TO-15
H&P Mobile Geochemistry, Inc.

Result Analyte Limit
Reporting
Units
Dilution
Batch Prepared Analyzed Method Notes Factor
VP-1-5 (E211049-03) Vapor Sampled: 16-Nov-22 Received: 16-Nov-22 EPA TO-1530-Nov-22 30-Nov-22ug/m3 EK2301511,1-Difluoroethane (LCC) 5.5ND "" "" ""Dichlorodifluoromethane (F12) 5.0ND
"" "" ""Chloromethane 2.1ND
"" "" ""Dichlorotetrafluoroethane (F114) 7.1ND
"" "" ""Vinyl chloride 2.6ND
"" "" ""Bromomethane 16ND
"" "" ""Chloroethane 8.0ND
" " "" "Trichlor
ofluoromethane (F11) "5.622
"" "" ""1,1-Dichloroethene 4.0ND
" " "" "1,1,2-Trichlorotrifluoroethane (F113) "7.794
"" "" ""Methylene chloride (Dichloromethane) 3.5ND
"" "" ""Carbon disulfide 6.3ND
"" "" ""trans-1,2-Dichloroethene 8.0ND
"" "" ""1,1-Dichloroethane 4.1ND
"" "" ""2-Butanone (MEK) 30ND
"" "" ""cis-1,2-Dichloroethene 4.0ND
"" "" ""Chloroform 4.9ND
"" "" ""1,1,1-Trichloroethane 5.5ND
"" "" ""1,2-Dichloroethane (EDC) 4.1ND
"" "" ""Benzene 3.2ND
"" "" ""Carbon tetrachloride 6.4ND
" " "" "Trichloroethene "5.597
"" "" ""1,2-Dichloropropane 9.4ND
"" "" ""Bromodichloromethane 6.8ND
"" "" ""cis-1,3-Dichloropropene 4.6ND
"" "" ""4-Methyl-2-pentanone (MIBK) 8.3ND
"" "" ""trans-1,3-Dichloropropene 4.6ND
"" "" ""Toluene 3.8ND
"" "" ""1,1,2-Trichloroethane 5.5ND
"" "" ""2-Hexanone (MBK) 8.3ND
"" "" ""Dibromochloromethane 8.6ND
" " "" "Tetrachloroethene "6.9150
"" "" ""1,2-Dibromoethane (EDB) 7.8ND
"" "" ""1,1,1,2-Tetrachloroethane 7.0ND
"" "" ""Chlorobenzene 4.7ND
"" "" ""Ethylbenzene 4.4ND
"" "" ""m,p-Xylene 8.8ND
"" "" ""Styrene 4.3ND

Page 22 of 102 ends

Project:

Project Number:

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Reported:

Volatile Organic Compounds by EPA TO-15
H&P Mobile Geochemistry, Inc.

Result Analyte Limit
Reporting
Units
Dilution
Batch Prepared Analyzed Method Notes Factor
VP-1-5 (E211049-03) Vapor Sampled: 16-Nov-22 Received: 16-Nov-22 EPA TO-1530-Nov-22 30-Nov-22ug/m3 EK230151o-Xylene 4.4ND "" "" ""Bromoform 10ND
"" "" ""1,1,2,2-Tetrachloroethane 7.0ND
"" "" ""4-Ethyltoluene 5.0ND
"" "" ""1,3,5-Trimethylbenzene 5.0ND
"" "" ""1,2,4-Trimethylbenzene 5.0ND
"" "" ""1,3-Dichlorobenzene 12ND
"" "" ""1,4-Dichlorobenzene 12ND
"" "" ""1,2-Dichlorobenzene 12ND
"" "" ""1,2,4-T
richlorobenzene 38ND
"" "" ""Hexachlorobutadiene 54ND
" " " "117 % 76-134Surrogate: 1,2-Dichloroethane-d4
" " " "106 % 78-125Surrogate: Toluene-d8
" " " "88.2 % 77-127Surrogate: 4-Bromofluorobenzene
AA (E211049-04) Vapor Sampled: 16-Nov-22 Received: 16-Nov-22 EPA TO-1530-Nov-22 30-Nov-22ug/m3 EK230151Dichlorodifluoromethane (F12) 5.0ND "" "" ""Chloromethane 2.1ND
"" "" ""Dichlorotetrafluoroethane (F114) 7.1ND
"" "" ""Vinyl chloride 2.6ND
"" "" ""Bromomethane 16ND
"" "" ""Chloroethane 8.0ND
"" "" ""Trichlorofluoromethane (F11) 5.6ND
"" "" ""1,1-Dichloroethene 4.0ND
"" "" ""1,1,2-Trichlorotrifluoroethane (F113) 7.7ND
"" "" ""Methylene chloride (Dichloromethane) 3.5ND
"" "" ""Carbon disulfide 6.3ND
"" "" ""trans-1,2-Dichloroethene 8.0ND
"" "" ""1,1-Dichloroethane 4.1ND
"" "" ""2-Butanone (MEK) 30ND
"" "" ""cis-1,2-Dichloroethene 4.0ND
"" "" ""Chloroform 4.9ND
"" "" ""1,1,1-Trichloroethane 5.5ND
"" "" ""1,2-Dichloroethane (EDC) 4.1ND
"" "" ""Benzene 3.2ND
"" "" ""Carbon tetrachloride 6.4ND
"" "" ""Trichloroethene 5.5ND

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Project Number:

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Reported:

Volatile Organic Compounds by EPA TO-15
H&P Mobile Geochemistry, Inc.

Result Analyte Limit
Reporting
Units
Dilution
Batch Prepared Analyzed Method Notes Factor
AA (E211049-04) Vapor Sampled: 16-Nov-22 Received: 16-Nov-22 EPA TO-1530-Nov-22 30-Nov-22ug/m3 EK2301511,2-Dichloropropane 9.4ND "" "" ""Bromodichloromethane 6.8ND
"" "" ""cis-1,3-Dichloropropene 4.6ND
"" "" ""4-Methyl-2-pentanone (MIBK) 8.3ND
"" "" ""trans-1,3-Dichloropropene 4.6ND
"" "" ""Toluene 3.8ND
"" "" ""1,1,2-Trichloroethane 5.5ND
"" "" ""2-Hexanone (MBK) 8.3ND
"" "" ""Dibromochloromethane 8.6ND
"" "" ""Tetrachloroethene 6.9ND
"" "" ""1,2-Dibromoethane (EDB) 7.8ND
"" "" ""1,1,1,2-T
etrachloroethane 7.0ND
"" "" ""Chlorobenzene 4.7ND
"" "" ""Ethylbenzene 4.4ND
"" "" ""m,p-Xylene 8.8ND
"" "" ""Styrene 4.3ND
"" "" ""o-Xylene 4.4ND
"" "" ""Bromoform 10ND
"" "" ""1,1,2,2-Tetrachloroethane 7.0ND
"" "" ""4-Ethyltoluene 5.0ND
"" "" ""1,3,5-Trimethylbenzene 5.0ND
"" "" ""1,2,4-Trimethylbenzene 5.0ND
"" "" ""1,3-Dichlorobenzene 12ND
"" "" ""1,4-Dichlorobenzene 12ND
"" "" ""1,2-Dichlorobenzene 12ND
"" "" ""1,2,4-Trichlorobenzene 38ND
"" "" ""Hexachlorobutadiene 54ND
" " " "118 % 76-134Surrogate: 1,2-Dichloroethane-d4
" " " "108 % 78-125Surrogate: Toluene-d8
" " " "86.4 % 77-127Surrogate: 4-Bromofluorobenzene

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Project Number:

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Reported:

Volatile Organic Compounds by EPA TO-15
H&P Mobile Geochemistry, Inc.

Result Analyte Limit
Reporting
Units
Dilution
Batch Prepared Analyzed Method Notes Factor
VP-9-30 (E211049-05) Vapor Sampled: 16-Nov-22 Received: 16-Nov-22 EPA TO-1530-Nov-22 30-Nov-22ug/m3 EK2301511,1-Difluoroethane (LCC) 5.5ND " " "" "Dichlorodifluoromethane (F12) "5.08.4
"" "" ""Chloromethane 2.1ND
"" "" ""Dichlorotetrafluoroethane (F114) 7.1ND
"" "" ""V
inyl chloride 2.6ND
"" "" ""Bromomethane 16ND
"" "" ""Chloroethane 8.0ND
" " "" "Trichlorofluoromethane (F11) "5.686
" " "" "1,1-Dichloroethene "4.0110
" " "" "1,1,2-Trichlorotrifluoroethane (F113) "7.7370
"" "" ""Methylene chloride (Dichloromethane) 3.5ND
" " "" "Carbon disulfide "6.312
"" "" ""trans-1,2-Dichloroethene 8.0ND
"" "" ""1,1-Dichloroethane 4.1ND
" " "" "2-Butanone (MEK) "3062
"" "" ""cis-1,2-Dichloroethene 4.0ND
" " "" "Chloroform "4.920
"" "" ""1,1,1-Trichloroethane 5.5ND
"" "" ""1,2-Dichloroethane (EDC) 4.1ND
"" "" ""Benzene 3.2ND
"" "" ""Carbon tetrachloride 6.4ND
" " "" "Trichloroethene "5.51700
"" "" ""1,2-Dichloropropane 9.4ND
"" "" ""Bromodichloromethane 6.8ND
"" "" ""cis-1,3-Dichloropropene 4.6ND
"" "" ""4-Methyl-2-pentanone (MIBK) 8.3ND
"" "" ""trans-1,3-Dichloropropene 4.6ND
"" "" ""Toluene 3.8ND
"" "" ""1,1,2-Trichloroethane 5.5ND
"" "" ""2-Hexanone (MBK) 8.3ND
"" "" ""Dibromochloromethane 8.6ND
" " "" "Tetrachloroethene "6.9670
"" "" ""1,2-Dibromoethane (EDB) 7.8ND
"" "" ""1,1,1,2-Tetrachloroethane 7.0ND
"" "" ""Chlorobenzene 4.7ND
"" "" ""Ethylbenzene 4.4ND
"" "" ""m,p-Xylene 8.8ND
"" "" ""Styrene 4.3ND

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Project Number:

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Reported:

Volatile Organic Compounds by EPA TO-15
H&P Mobile Geochemistry, Inc.

Result Analyte Limit
Reporting
Units
Dilution
Batch Prepared Analyzed Method Notes Factor
VP-9-30 (E211049-05) Vapor Sampled: 16-Nov-22 Received: 16-Nov-22 EPA TO-1530-Nov-22 30-Nov-22ug/m3 EK230151o-Xylene 4.4ND "" "" ""Bromoform 10ND
"" "" ""1,1,2,2-Tetrachloroethane 7.0ND
"" "" ""4-Ethyltoluene 5.0ND
"" "" ""1,3,5-Trimethylbenzene 5.0ND
"" "" ""1,2,4-Trimethylbenzene 5.0ND
"" "" ""1,3-Dichlorobenzene 12ND
"" "" ""1,4-Dichlorobenzene 12ND
"" "" ""1,2-Dichlorobenzene 12ND
"" "" ""1,2,4-T
richlorobenzene 38ND
"" "" ""Hexachlorobutadiene 54ND
" " " "118 % 76-134Surrogate: 1,2-Dichloroethane-d4
" " " "104 % 78-125Surrogate: Toluene-d8
" " " "84.4 % 77-127Surrogate: 4-Bromofluorobenzene
VP-9-15 (E211049-06) Vapor Sampled: 16-Nov-22 Received: 16-Nov-22 EPA TO-1530-Nov-22 30-Nov-22ug/m3 EK2301511,1-Difluoroethane (LCC) 5.5ND " " "" "Dichlorodifluoromethane (F12) "5.06.8
"" "" ""Chloromethane 2.1ND
"" "" ""Dichlorotetrafluoroethane (F114) 7.1ND
"" "" ""Vinyl chloride 2.6ND
"" "" ""Bromomethane 16ND
"" "" ""Chloroethane 8.0ND
" " "" "Trichlorofluoromethane (F11) "5.653
" " "" "1,1-Dichloroethene "4.06.5
" " "" "1,1,2-Trichlorotrifluoroethane (F113) "7.7230
"" "" ""Methylene chloride (Dichloromethane) 3.5ND
" " "" "Carbon disulfide "6.329
"" "" ""trans-1,2-Dichloroethene 8.0ND
"" "" ""1,1-Dichloroethane 4.1ND
" " "" "2-Butanone (MEK) "3040
"" "" ""cis-1,2-Dichloroethene 4.0ND
" " "" "Chloroform "4.96.4
"" "" ""1,1,1-Trichloroethane 5.5ND
"" "" ""1,2-Dichloroethane (EDC) 4.1ND
" " "" "Benzene "3.26.2
"" "" ""Carbon tetrachloride 6.4ND

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Project Number:

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Reported:

Volatile Organic Compounds by EP
A TO-15
H&P Mobile Geochemistry, Inc.

Result Analyte Limit
Reporting
Units
Dilution
Batch Prepared
Analyzed Method Notes Factor
VP-9-15 (E211049-06)
Vapor Sampled: 16-Nov-22 Received: 16-Nov-22
EK23015 30-Nov-22 30-Nov-22ug/m3 1Trichloroethene EPA TO-155.5380 "" "" ""1,2-Dichloropropane 9.4ND
"" "" ""Bromodichloromethane 6.8ND
"" "" ""cis-1,3-Dichloropropene 4.6ND
"" "" ""4-Methyl-2-pentanone (MIBK) 8.3ND
"" "" ""trans-1,3-Dichloropropene 4.6ND
" " "" "Toluene "3.84.7
"" "" ""1,1,2-Trichloroethane 5.5ND
"" "" ""2-Hexanone (MBK) 8.3ND
"" "" ""Dibromochloromethane 8.6ND
" " "" "Tetrachlor
oethene "6.9250
"" "" ""1,2-Dibromoethane (EDB) 7.8ND
"" "" ""1,1,1,2-Tetrachloroethane 7.0ND
"" "" ""Chlorobenzene 4.7ND
"" "" ""Ethylbenzene 4.4ND
"" "" ""m,p-Xylene 8.8ND
"" "" ""Styrene 4.3ND
"" "" ""o-Xylene 4.4ND
"" "" ""Bromoform 10ND
"" "" ""1,1,2,2-Tetrachloroethane 7.0ND
"" "" ""4-Ethyltoluene 5.0ND
"" "" ""1,3,5-Trimethylbenzene 5.0ND
"" "" ""1,2,4-Trimethylbenzene 5.0ND
"" "" ""1,3-Dichlorobenzene 12ND
"" "" ""1,4-Dichlorobenzene 12ND
"" "" ""1,2-Dichlorobenzene 12ND
"" "" ""1,2,4-Trichlorobenzene 38ND
"" "" ""Hexachlorobutadiene 54ND
" " " "121 % 76-134Surrogate: 1,2-Dichloroethane-d4
" " " "105 % 78-125Surrogate: Toluene-d8
" " " "83.6 % 77-127Surrogate: 4-Bromofluorobenzene

Page 27 of 102 ends

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Project Number:

Project Manager:

Reported:

Volatile Organic Compounds by EPA TO-15
H&P Mobile Geochemistry, Inc.

Result Analyte Limit
Reporting
Units
Dilution
Batch Prepared Analyzed Method Notes Factor
VP-9-5 (E211049-07) Vapor Sampled: 16-Nov-22 Received: 16-Nov-22 EPA TO-1530-Nov-22 30-Nov-22ug/m3 EK2301511,1-Difluoroethane (LCC) 5.5ND "" "" ""Dichlorodifluoromethane (F12) 5.0ND
"" "" ""Chloromethane 2.1ND
"" "" ""Dichlorotetrafluoroethane (F114) 7.1ND
"" "" ""Vinyl chloride 2.6ND
"" "" ""Bromomethane 16ND
"" "" ""Chloroethane 8.0ND
" " "" "Trichlor
ofluoromethane (F11) "5.613
"" "" ""1,1-Dichloroethene 4.0ND
" " "" "1,1,2-Trichlorotrifluoroethane (F113) "7.751
"" "" ""Methylene chloride (Dichloromethane) 3.5ND
" " "" "Carbon disulfide "6.315
"" "" ""trans-1,2-Dichloroethene 8.0ND
"" "" ""1,1-Dichloroethane 4.1ND
"" "" ""2-Butanone (MEK) 30ND
"" "" ""cis-1,2-Dichloroethene 4.0ND
"" "" ""Chloroform 4.9ND
"" "" ""1,1,1-Trichloroethane 5.5ND
"" "" ""1,2-Dichloroethane (EDC) 4.1ND
"" "" ""Benzene 3.2ND
"" "" ""Carbon tetrachloride 6.4ND
" " "" "Trichloroethene "5.517
"" "" ""1,2-Dichloropropane 9.4ND
"" "" ""Bromodichloromethane 6.8ND
"" "" ""cis-1,3-Dichloropropene 4.6ND
"" "" ""4-Methyl-2-pentanone (MIBK) 8.3ND
"" "" ""trans-1,3-Dichloropropene 4.6ND
"" "" ""Toluene 3.8ND
"" "" ""1,1,2-Trichloroethane 5.5ND
"" "" ""2-Hexanone (MBK) 8.3ND
"" "" ""Dibromochloromethane 8.6ND
" " "" "Tetrachloroethene "6.971
"" "" ""1,2-Dibromoethane (EDB) 7.8ND
"" "" ""1,1,1,2-Tetrachloroethane 7.0ND
"" "" ""Chlorobenzene 4.7ND
"" "" ""Ethylbenzene 4.4ND
"" "" ""m,p-Xylene 8.8ND
"" "" ""Styrene 4.3ND

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Project Number:

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Reported:

Volatile Organic Compounds by EPA TO-15
H&P Mobile Geochemistry, Inc.

Result Analyte Limit
Reporting
Units
Dilution
Batch Prepared Analyzed Method Notes Factor
VP-9-5 (E211049-07) Vapor Sampled: 16-Nov-22 Received: 16-Nov-22 EPA TO-1530-Nov-22 30-Nov-22ug/m3 EK230151o-Xylene 4.4ND "" "" ""Bromoform 10ND
"" "" ""1,1,2,2-Tetrachloroethane 7.0ND
"" "" ""4-Ethyltoluene 5.0ND
"" "" ""1,3,5-Trimethylbenzene 5.0ND
"" "" ""1,2,4-Trimethylbenzene 5.0ND
"" "" ""1,3-Dichlorobenzene 12ND
"" "" ""1,4-Dichlorobenzene 12ND
"" "" ""1,2-Dichlorobenzene 12ND
"" "" ""1,2,4-T
richlorobenzene 38ND
"" "" ""Hexachlorobutadiene 54ND
" " " "121 % 76-134Surrogate: 1,2-Dichloroethane-d4
" " " "108 % 78-125Surrogate: Toluene-d8
" " " "85.8 % 77-127Surrogate: 4-Bromofluorobenzene
VP-2-15 (E211049-08) Vapor Sampled: 16-Nov-22 Received: 16-Nov-22 EPA TO-1530-Nov-22 30-Nov-22ug/m3 EK2301511,1-Difluoroethane (LCC) 5.5ND " " "" "Dichlorodifluoromethane (F12) "5.08.2
"" "" ""Chloromethane 2.1ND
"" "" ""Dichlorotetrafluoroethane (F114) 7.1ND
"" "" ""Vinyl chloride 2.6ND
"" "" ""Bromomethane 16ND
"" "" ""Chloroethane 8.0ND
" " "" "Trichlorofluoromethane (F11) "5.656
" " "" "1,1-Dichloroethene "4.017
" " "" "1,1,2-Trichlorotrifluoroethane (F113) "7.7210
"" "" ""Methylene chloride (Dichloromethane) 3.5ND
" " "" "Carbon disulfide "6.37.4
"" "" ""trans-1,2-Dichloroethene 8.0ND
"" "" ""1,1-Dichloroethane 4.1ND
"" "" ""2-Butanone (MEK) 30ND
"" "" ""cis-1,2-Dichloroethene 4.0ND
" " "" "Chloroform "4.933
"" "" ""1,1,1-Trichloroethane 5.5ND
"" "" ""1,2-Dichloroethane (EDC) 4.1ND
"" "" ""Benzene 3.2ND
"" "" ""Carbon tetrachloride 6.4ND

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Project:

Project Number:

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Reported:

Volatile Organic Compounds by EP
A TO-15
H&P Mobile Geochemistry, Inc.

Result Analyte Limit
Reporting
Units
Dilution
Batch Prepared
Analyzed Method Notes Factor
VP-2-15 (E211049-08)
Vapor Sampled: 16-Nov-22 Received: 16-Nov-22
EK23015 30-Nov-22 30-Nov-22ug/m3 1Trichloroethene EPA TO-155.5510 "" "" ""1,2-Dichloropropane 9.4ND
"" "" ""Bromodichloromethane 6.8ND
"" "" ""cis-1,3-Dichloropropene 4.6ND
"" "" ""4-Methyl-2-pentanone (MIBK) 8.3ND
"" "" ""trans-1,3-Dichloropropene 4.6ND
"" "" ""Toluene 3.8ND
"" "" ""1,1,2-Trichloroethane 5.5ND
"" "" ""2-Hexanone (MBK) 8.3ND
"" "" ""Dibromochloromethane 8.6ND
" " "" "Tetrachlor
oethene "6.9450
"" "" ""1,2-Dibromoethane (EDB) 7.8ND
"" "" ""1,1,1,2-Tetrachloroethane 7.0ND
"" "" ""Chlorobenzene 4.7ND
"" "" ""Ethylbenzene 4.4ND
"" "" ""m,p-Xylene 8.8ND
"" "" ""Styrene 4.3ND
"" "" ""o-Xylene 4.4ND
"" "" ""Bromoform 10ND
"" "" ""1,1,2,2-Tetrachloroethane 7.0ND
"" "" ""4-Ethyltoluene 5.0ND
"" "" ""1,3,5-Trimethylbenzene 5.0ND
"" "" ""1,2,4-Trimethylbenzene 5.0ND
"" "" ""1,3-Dichlorobenzene 12ND
"" "" ""1,4-Dichlorobenzene 12ND
"" "" ""1,2-Dichlorobenzene 12ND
"" "" ""1,2,4-Trichlorobenzene 38ND
"" "" ""Hexachlorobutadiene 54ND
" " " "123 % 76-134Surrogate: 1,2-Dichloroethane-d4
" " " "106 % 78-125Surrogate: Toluene-d8
" " " "83.7 % 77-127Surrogate: 4-Bromofluorobenzene

Page 30 of 102 ends

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Project Number:

Project Manager:

Reported:

Volatile Organic Compounds by EPA TO-15
H&P Mobile Geochemistry, Inc.

Result Analyte Limit
Reporting
Units
Dilution
Batch Prepared Analyzed Method Notes Factor
VP-2-5 (E211049-09) Vapor Sampled: 16-Nov-22 Received: 16-Nov-22 EPA TO-1530-Nov-22 30-Nov-22ug/m3 EK2301511,1-Difluoroethane (LCC) 5.5ND "" "" ""Dichlorodifluoromethane (F12) 5.0ND
"" "" ""Chloromethane 2.1ND
"" "" ""Dichlorotetrafluoroethane (F114) 7.1ND
"" "" ""Vinyl chloride 2.6ND
"" "" ""Bromomethane 16ND
"" "" ""Chloroethane 8.0ND
" " "" "Trichlor
ofluoromethane (F11) "5.623
"" "" ""1,1-Dichloroethene 4.0ND
" " "" "1,1,2-Trichlorotrifluoroethane (F113) "7.772
"" "" ""Methylene chloride (Dichloromethane) 3.5ND
" " "" "Carbon disulfide "6.37.5
"" "" ""trans-1,2-Dichloroethene 8.0ND
"" "" ""1,1-Dichloroethane 4.1ND
"" "" ""2-Butanone (MEK) 30ND
"" "" ""cis-1,2-Dichloroethene 4.0ND
"" "" ""Chloroform 4.9ND
"" "" ""1,1,1-Trichloroethane 5.5ND
"" "" ""1,2-Dichloroethane (EDC) 4.1ND
"" "" ""Benzene 3.2ND
"" "" ""Carbon tetrachloride 6.4ND
" " "" "Trichloroethene "5.548
"" "" ""1,2-Dichloropropane 9.4ND
"" "" ""Bromodichloromethane 6.8ND
"" "" ""cis-1,3-Dichloropropene 4.6ND
"" "" ""4-Methyl-2-pentanone (MIBK) 8.3ND
"" "" ""trans-1,3-Dichloropropene 4.6ND
"" "" ""Toluene 3.8ND
"" "" ""1,1,2-Trichloroethane 5.5ND
"" "" ""2-Hexanone (MBK) 8.3ND
"" "" ""Dibromochloromethane 8.6ND
" " "" "Tetrachloroethene "6.9110
"" "" ""1,2-Dibromoethane (EDB) 7.8ND
"" "" ""1,1,1,2-Tetrachloroethane 7.0ND
"" "" ""Chlorobenzene 4.7ND
"" "" ""Ethylbenzene 4.4ND
"" "" ""m,p-Xylene 8.8ND
"" "" ""Styrene 4.3ND

Page 31 of 102 ends

Project:

Project Number:

Project Manager:

Reported:

Volatile Organic Compounds by EPA TO-15
H&P Mobile Geochemistry, Inc.

Result Analyte Limit
Reporting
Units
Dilution
Batch Prepared Analyzed Method Notes Factor
VP-2-5 (E211049-09) Vapor Sampled: 16-Nov-22 Received: 16-Nov-22 EPA TO-1530-Nov-22 30-Nov-22ug/m3 EK230151o-Xylene 4.4ND "" "" ""Bromoform 10ND
"" "" ""1,1,2,2-Tetrachloroethane 7.0ND
"" "" ""4-Ethyltoluene 5.0ND
"" "" ""1,3,5-Trimethylbenzene 5.0ND
"" "" ""1,2,4-Trimethylbenzene 5.0ND
"" "" ""1,3-Dichlorobenzene 12ND
"" "" ""1,4-Dichlorobenzene 12ND
"" "" ""1,2-Dichlorobenzene 12ND
"" "" ""1,2,4-T
richlorobenzene 38ND
"" "" ""Hexachlorobutadiene 54ND
" " " "125 % 76-134Surrogate: 1,2-Dichloroethane-d4
" " " "110 % 78-125Surrogate: Toluene-d8
" " " "84.1 % 77-127Surrogate: 4-Bromofluorobenzene
VP-3-15 (E211049-10) Vapor Sampled: 16-Nov-22 Received: 16-Nov-22 EPA TO-1530-Nov-22 30-Nov-22ug/m3 EK2301511,1-Difluoroethane (LCC) 5.5ND " " "" "Dichlorodifluoromethane (F12) "5.07.9
"" "" ""Chloromethane 2.1ND
"" "" ""Dichlorotetrafluoroethane (F114) 7.1ND
"" "" ""Vinyl chloride 2.6ND
"" "" ""Bromomethane 16ND
"" "" ""Chloroethane 8.0ND
" " "" "Trichlorofluoromethane (F11) "5.666
"" "" ""1,1-Dichloroethene 4.0ND
" " "" "1,1,2-Trichlorotrifluoroethane (F113) "7.7140
"" "" ""Methylene chloride (Dichloromethane) 3.5ND
"" "" ""Carbon disulfide 6.3ND
"" "" ""trans-1,2-Dichloroethene 8.0ND
"" "" ""1,1-Dichloroethane 4.1ND
"" "" ""2-Butanone (MEK) 30ND
"" "" ""cis-1,2-Dichloroethene 4.0ND
" " "" "Chloroform "4.923
"" "" ""1,1,1-Trichloroethane 5.5ND
"" "" ""1,2-Dichloroethane (EDC) 4.1ND
"" "" ""Benzene 3.2ND
"" "" ""Carbon tetrachloride 6.4ND

Page 32 of 102 ends

Project:

Project Number:

Project Manager:

Reported:

Volatile Organic Compounds by EP
A TO-15
H&P Mobile Geochemistry, Inc.

Result Analyte Limit
Reporting
Units
Dilution
Batch Prepared
Analyzed Method Notes Factor
VP-3-15 (E211049-10)
Vapor Sampled: 16-Nov-22 Received: 16-Nov-22
EK23015 30-Nov-22 30-Nov-22ug/m3 1Trichloroethene EPA TO-155.5250 "" "" ""1,2-Dichloropropane 9.4ND
"" "" ""Bromodichloromethane 6.8ND
"" "" ""cis-1,3-Dichloropropene 4.6ND
"" "" ""4-Methyl-2-pentanone (MIBK) 8.3ND
"" "" ""trans-1,3-Dichloropropene 4.6ND
"" "" ""Toluene 3.8ND
"" "" ""1,1,2-Trichloroethane 5.5ND
"" "" ""2-Hexanone (MBK) 8.3ND
"" "" ""Dibromochloromethane 8.6ND
" " "" "Tetrachlor
oethene "6.9240
"" "" ""1,2-Dibromoethane (EDB) 7.8ND
"" "" ""1,1,1,2-Tetrachloroethane 7.0ND
"" "" ""Chlorobenzene 4.7ND
"" "" ""Ethylbenzene 4.4ND
"" "" ""m,p-Xylene 8.8ND
"" "" ""Styrene 4.3ND
"" "" ""o-Xylene 4.4ND
"" "" ""Bromoform 10ND
"" "" ""1,1,2,2-Tetrachloroethane 7.0ND
"" "" ""4-Ethyltoluene 5.0ND
"" "" ""1,3,5-Trimethylbenzene 5.0ND
"" "" ""1,2,4-Trimethylbenzene 5.0ND
"" "" ""1,3-Dichlorobenzene 12ND
"" "" ""1,4-Dichlorobenzene 12ND
"" "" ""1,2-Dichlorobenzene 12ND
"" "" ""1,2,4-Trichlorobenzene 38ND
"" "" ""Hexachlorobutadiene 54ND
" " " "124 % 76-134Surrogate: 1,2-Dichloroethane-d4
" " " "108 % 78-125Surrogate: Toluene-d8
" " " "83.0 % 77-127Surrogate: 4-Bromofluorobenzene

Page 33 of 102 ends

Project:

Project Number:

Project Manager:

Reported:

Volatile Organic Compounds by EPA TO-15
H&P Mobile Geochemistry, Inc.

Result Analyte Limit
Reporting
Units
Dilution
Batch Prepared Analyzed Method Notes Factor
VP-3-5 (E211049-11) Vapor Sampled: 16-Nov-22 Received: 16-Nov-22 EK23015 30-Nov-22 01-Dec-22ug/m3 11,1-Difluoroethane (LCC) EPA TO-155.514 "" "" ""Dichlorodifluoromethane (F12) 5.0ND
"" "" ""Chloromethane 2.1ND
"" "" ""Dichlorotetrafluoroethane (F114) 7.1ND
"" "" ""Vinyl chloride 2.6ND
"" "" ""Bromomethane 16ND
"" "" ""Chloroethane 8.0ND
" " "" "Trichlor
ofluoromethane (F11) "5.65.9
"" "" ""1,1-Dichloroethene 4.0ND
" " "" "1,1,2-Trichlorotrifluoroethane (F113) "7.78.3
" " "" "Methylene chloride (Dichloromethane) "3.59.1
" " "" "Carbon disulfide "6.319
"" "" ""trans-1,2-Dichloroethene 8.0ND
"" "" ""1,1-Dichloroethane 4.1ND
"" "" ""2-Butanone (MEK) 30ND
"" "" ""cis-1,2-Dichloroethene 4.0ND
" " "" "Chloroform "4.911
"" "" ""1,1,1-Trichloroethane 5.5ND
"" "" ""1,2-Dichloroethane (EDC) 4.1ND
" " "" "Benzene "3.26.7
"" "" ""Carbon tetrachloride 6.4ND
" " "" "Trichloroethene "5.528
"" "" ""1,2-Dichloropropane 9.4ND
"" "" ""Bromodichloromethane 6.8ND
"" "" ""cis-1,3-Dichloropropene 4.6ND
"" "" ""4-Methyl-2-pentanone (MIBK) 8.3ND
"" "" ""trans-1,3-Dichloropropene 4.6ND
" " "" "Toluene "3.814
"" "" ""1,1,2-Trichloroethane 5.5ND
"" "" ""2-Hexanone (MBK) 8.3ND
"" "" ""Dibromochloromethane 8.6ND
" " "" "Tetrachloroethene "6.912
"" "" ""1,2-Dibromoethane (EDB) 7.8ND
"" "" ""1,1,1,2-Tetrachloroethane 7.0ND
"" "" ""Chlorobenzene 4.7ND
"" "" ""Ethylbenzene 4.4ND
"" "" ""m,p-Xylene 8.8ND
"" "" ""Styrene 4.3ND

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Project:

Project Number:

Project Manager:

Reported:

Volatile Organic Compounds by EPA TO-15
H&P Mobile Geochemistry, Inc.

Result Analyte Limit
Reporting
Units
Dilution
Batch Prepared Analyzed Method Notes Factor
VP-3-5 (E211049-11) Vapor Sampled: 16-Nov-22 Received: 16-Nov-22 EPA TO-1530-Nov-22 01-Dec-22ug/m3 EK230151o-Xylene 4.4ND "" "" ""Bromoform 10ND
"" "" ""1,1,2,2-Tetrachloroethane 7.0ND
"" "" ""4-Ethyltoluene 5.0ND
"" "" ""1,3,5-Trimethylbenzene 5.0ND
"" "" ""1,2,4-Trimethylbenzene 5.0ND
"" "" ""1,3-Dichlorobenzene 12ND
"" "" ""1,4-Dichlorobenzene 12ND
"" "" ""1,2-Dichlorobenzene 12ND
"" "" ""1,2,4-T
richlorobenzene 38ND
"" "" ""Hexachlorobutadiene 54ND
" " " "124 % 76-134Surrogate: 1,2-Dichloroethane-d4
" " " "109 % 78-125Surrogate: Toluene-d8
" " " "85.9 % 77-127Surrogate: 4-Bromofluorobenzene
VP-11-15 (E211049-12) Vapor Sampled: 16-Nov-22 Received: 16-Nov-22 EPA TO-1530-Nov-22 01-Dec-22ug/m3 EK2301511,1-Difluoroethane (LCC) 5.5ND " " "" "Dichlorodifluoromethane (F12) "5.07.9
"" "" ""Chloromethane 2.1ND
"" "" ""Dichlorotetrafluoroethane (F114) 7.1ND
"" "" ""Vinyl chloride 2.6ND
"" "" ""Bromomethane 16ND
"" "" ""Chloroethane 8.0ND
" " "" "Trichlorofluoromethane (F11) "5.690
"" "" ""1,1-Dichloroethene 4.0ND
" " "" "1,1,2-Trichlorotrifluoroethane (F113) "7.7240
"" "" ""Methylene chloride (Dichloromethane) 3.5ND
"" "" ""Carbon disulfide 6.3ND
"" "" ""trans-1,2-Dichloroethene 8.0ND
"" "" ""1,1-Dichloroethane 4.1ND
"" "" ""2-Butanone (MEK) 30ND
"" "" ""cis-1,2-Dichloroethene 4.0ND
"" "" ""Chloroform 4.9ND
"" "" ""1,1,1-Trichloroethane 5.5ND
"" "" ""1,2-Dichloroethane (EDC) 4.1ND
"" "" ""Benzene 3.2ND
"" "" ""Carbon tetrachloride 6.4ND

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Project:

Project Number:

Project Manager:

Reported:

Volatile Organic Compounds by EP
A TO-15
H&P Mobile Geochemistry, Inc.

Result Analyte Limit
Reporting
Units
Dilution
Batch Prepared
Analyzed Method Notes Factor
VP-11-15 (E21
1049-12) Vapor Sampled: 16-Nov-22 Received: 16-Nov-22 EK23015 30-Nov-22 01-Dec-22ug/m3 1Trichloroethene EPA TO-155.5770 "" "" ""1,2-Dichloropropane 9.4ND
"" "" ""Bromodichloromethane 6.8ND
"" "" ""cis-1,3-Dichloropropene 4.6ND
"" "" ""4-Methyl-2-pentanone (MIBK) 8.3ND
"" "" ""trans-1,3-Dichloropropene 4.6ND
"" "" ""Toluene 3.8ND
"" "" ""1,1,2-Trichloroethane 5.5ND
"" "" ""2-Hexanone (MBK) 8.3ND
"" "" ""Dibromochloromethane 8.6ND
" " "" "Tetrachlor
oethene "6.9460
"" "" ""1,2-Dibromoethane (EDB) 7.8ND
"" "" ""1,1,1,2-Tetrachloroethane 7.0ND
"" "" ""Chlorobenzene 4.7ND
"" "" ""Ethylbenzene 4.4ND
"" "" ""m,p-Xylene 8.8ND
"" "" ""Styrene 4.3ND
"" "" ""o-Xylene 4.4ND
"" "" ""Bromoform 10ND
"" "" ""1,1,2,2-Tetrachloroethane 7.0ND
"" "" ""4-Ethyltoluene 5.0ND
"" "" ""1,3,5-Trimethylbenzene 5.0ND
"" "" ""1,2,4-Trimethylbenzene 5.0ND
"" "" ""1,3-Dichlorobenzene 12ND
"" "" ""1,4-Dichlorobenzene 12ND
"" "" ""1,2-Dichlorobenzene 12ND
"" "" ""1,2,4-Trichlorobenzene 38ND
"" "" ""Hexachlorobutadiene 54ND
" " " "124 % 76-134Surrogate: 1,2-Dichloroethane-d4
" " " "106 % 78-125Surrogate: Toluene-d8
" " " "83.2 % 77-127Surrogate: 4-Bromofluorobenzene

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Project Number:

Project Manager:

Reported:

Volatile Organic Compounds by EPA TO-15
H&P Mobile Geochemistry, Inc.

Result Analyte Limit
Reporting
Units
Dilution
Batch Prepared Analyzed Method Notes Factor
VP-11-5 (E211049-13) Vapor Sampled: 16-Nov-22 Received: 16-Nov-22 EPA TO-1530-Nov-22 01-Dec-22ug/m3 EK2301511,1-Difluoroethane (LCC) 5.5ND " " "" "Dichlorodifluoromethane (F12) "5.05.3
"" "" ""Chloromethane 2.1ND
"" "" ""Dichlorotetrafluoroethane (F114) 7.1ND
"" "" ""V
inyl chloride 2.6ND
"" "" ""Bromomethane 16ND
"" "" ""Chloroethane 8.0ND
" " "" "Trichlorofluoromethane (F11) "5.634
"" "" ""1,1-Dichloroethene 4.0ND
" " "" "1,1,2-Trichlorotrifluoroethane (F113) "7.795
"" "" ""Methylene chloride (Dichloromethane) 3.5ND
"" "" ""Carbon disulfide 6.3ND
"" "" ""trans-1,2-Dichloroethene 8.0ND
"" "" ""1,1-Dichloroethane 4.1ND
"" "" ""2-Butanone (MEK) 30ND
"" "" ""cis-1,2-Dichloroethene 4.0ND
"" "" ""Chloroform 4.9ND
"" "" ""1,1,1-Trichloroethane 5.5ND
"" "" ""1,2-Dichloroethane (EDC) 4.1ND
"" "" ""Benzene 3.2ND
"" "" ""Carbon tetrachloride 6.4ND
" " "" "Trichloroethene "5.529
"" "" ""1,2-Dichloropropane 9.4ND
"" "" ""Bromodichloromethane 6.8ND
"" "" ""cis-1,3-Dichloropropene 4.6ND
"" "" ""4-Methyl-2-pentanone (MIBK) 8.3ND
"" "" ""trans-1,3-Dichloropropene 4.6ND
"" "" ""Toluene 3.8ND
"" "" ""1,1,2-Trichloroethane 5.5ND
"" "" ""2-Hexanone (MBK) 8.3ND
"" "" ""Dibromochloromethane 8.6ND
" " "" "Tetrachloroethene "6.989
"" "" ""1,2-Dibromoethane (EDB) 7.8ND
"" "" ""1,1,1,2-Tetrachloroethane 7.0ND
"" "" ""Chlorobenzene 4.7ND
"" "" ""Ethylbenzene 4.4ND
"" "" ""m,p-Xylene 8.8ND
"" "" ""Styrene 4.3ND

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Project Number:

Project Manager:

Reported:

Volatile Organic Compounds by EPA TO-15
H&P Mobile Geochemistry, Inc.

Result Analyte Limit
Reporting
Units
Dilution
Batch Prepared Analyzed Method Notes Factor
VP-11-5 (E211049-13) Vapor Sampled: 16-Nov-22 Received: 16-Nov-22 EPA TO-1530-Nov-22 01-Dec-22ug/m3 EK230151o-Xylene 4.4ND "" "" ""Bromoform 10ND
"" "" ""1,1,2,2-Tetrachloroethane 7.0ND
"" "" ""4-Ethyltoluene 5.0ND
"" "" ""1,3,5-Trimethylbenzene 5.0ND
"" "" ""1,2,4-Trimethylbenzene 5.0ND
"" "" ""1,3-Dichlorobenzene 12ND
"" "" ""1,4-Dichlorobenzene 12ND
"" "" ""1,2-Dichlorobenzene 12ND
"" "" ""1,2,4-T
richlorobenzene 38ND
"" "" ""Hexachlorobutadiene 54ND
" " " "122 % 76-134Surrogate: 1,2-Dichloroethane-d4
" " " "110 % 78-125Surrogate: Toluene-d8
" " " "81.8 % 77-127Surrogate: 4-Bromofluorobenzene
VP-10-15 (E211049-14) Vapor Sampled: 16-Nov-22 Received: 16-Nov-22 EPA TO-1530-Nov-22 01-Dec-22ug/m3 EK2301511,1-Difluoroethane (LCC) 5.5ND " " "" "Dichlorodifluoromethane (F12) "5.06.3
"" "" ""Chloromethane 2.1ND
"" "" ""Dichlorotetrafluoroethane (F114) 7.1ND
"" "" ""Vinyl chloride 2.6ND
"" "" ""Bromomethane 16ND
"" "" ""Chloroethane 8.0ND
" " "" "Trichlorofluoromethane (F11) "5.651
" " "" "1,1-Dichloroethene "4.017
" " "" "1,1,2-Trichlorotrifluoroethane (F113) "7.799
"" "" ""Methylene chloride (Dichloromethane) 3.5ND
" " "" "Carbon disulfide "6.313
"" "" ""trans-1,2-Dichloroethene 8.0ND
"" "" ""1,1-Dichloroethane 4.1ND
"" "" ""2-Butanone (MEK) 30ND
"" "" ""cis-1,2-Dichloroethene 4.0ND
"" "" ""Chloroform 4.9ND
"" "" ""1,1,1-Trichloroethane 5.5ND
"" "" ""1,2-Dichloroethane (EDC) 4.1ND
"" "" ""Benzene 3.2ND
"" "" ""Carbon tetrachloride 6.4ND

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Project:

Project Number:

Project Manager:

Reported:

Volatile Organic Compounds by EP
A TO-15
H&P Mobile Geochemistry, Inc.

Result Analyte Limit
Reporting
Units
Dilution
Batch Prepared
Analyzed Method Notes Factor
VP-10-15 (E211049-14)
Vapor Sampled: 16-Nov-22 Received: 16-Nov-22
EK23015 30-Nov-22 01-Dec-22ug/m3 1Trichloroethene EPA TO-155.5430 "" "" ""1,2-Dichloropropane 9.4ND
"" "" ""Bromodichloromethane 6.8ND
"" "" ""cis-1,3-Dichloropropene 4.6ND
"" "" ""4-Methyl-2-pentanone (MIBK) 8.3ND
"" "" ""trans-1,3-Dichloropropene 4.6ND
" " "" "Toluene "3.84.3
"" "" ""1,1,2-Trichloroethane 5.5ND
"" "" ""2-Hexanone (MBK) 8.3ND
"" "" ""Dibromochloromethane 8.6ND
" " "" "Tetrachlor
oethene "6.9270
"" "" ""1,2-Dibromoethane (EDB) 7.8ND
"" "" ""1,1,1,2-Tetrachloroethane 7.0ND
"" "" ""Chlorobenzene 4.7ND
"" "" ""Ethylbenzene 4.4ND
"" "" ""m,p-Xylene 8.8ND
"" "" ""Styrene 4.3ND
"" "" ""o-Xylene 4.4ND
"" "" ""Bromoform 10ND
"" "" ""1,1,2,2-Tetrachloroethane 7.0ND
"" "" ""4-Ethyltoluene 5.0ND
"" "" ""1,3,5-Trimethylbenzene 5.0ND
"" "" ""1,2,4-Trimethylbenzene 5.0ND
"" "" ""1,3-Dichlorobenzene 12ND
"" "" ""1,4-Dichlorobenzene 12ND
"" "" ""1,2-Dichlorobenzene 12ND
"" "" ""1,2,4-Trichlorobenzene 38ND
"" "" ""Hexachlorobutadiene 54ND
" " " "124 % 76-134Surrogate: 1,2-Dichloroethane-d4
" " " "106 % 78-125Surrogate: Toluene-d8
" " " "80.6 % 77-127Surrogate: 4-Bromofluorobenzene

Page 39 of 102 ends

Project:

Project Number:

Project Manager:

Reported:

Volatile Organic Compounds by EPA TO-15
H&P Mobile Geochemistry, Inc.

Result Analyte Limit
Reporting
Units
Dilution
Batch Prepared Analyzed Method Notes Factor
VP-10-5 (E211049-15) Vapor Sampled: 16-Nov-22 Received: 16-Nov-22 EPA TO-1530-Nov-22 01-Dec-22ug/m3 EK2301511,1-Difluoroethane (LCC) 5.5ND "" "" ""Dichlorodifluoromethane (F12) 5.0ND
"" "" ""Chloromethane 2.1ND
"" "" ""Dichlorotetrafluoroethane (F114) 7.1ND
"" "" ""Vinyl chloride 2.6ND
"" "" ""Bromomethane 16ND
"" "" ""Chloroethane 8.0ND
" " "" "Trichlor
ofluoromethane (F11) "5.623
"" "" ""1,1-Dichloroethene 4.0ND
" " "" "1,1,2-Trichlorotrifluoroethane (F113) "7.737
"" "" ""Methylene chloride (Dichloromethane) 3.5ND
" " "" "Carbon disulfide "6.38.0
"" "" ""trans-1,2-Dichloroethene 8.0ND
"" "" ""1,1-Dichloroethane 4.1ND
"" "" ""2-Butanone (MEK) 30ND
"" "" ""cis-1,2-Dichloroethene 4.0ND
"" "" ""Chloroform 4.9ND
"" "" ""1,1,1-Trichloroethane 5.5ND
"" "" ""1,2-Dichloroethane (EDC) 4.1ND
" " "" "Benzene "3.23.5
"" "" ""Carbon tetrachloride 6.4ND
" " "" "Trichloroethene "5.570
"" "" ""1,2-Dichloropropane 9.4ND
"" "" ""Bromodichloromethane 6.8ND
"" "" ""cis-1,3-Dichloropropene 4.6ND
"" "" ""4-Methyl-2-pentanone (MIBK) 8.3ND
"" "" ""trans-1,3-Dichloropropene 4.6ND
"" "" ""Toluene 3.8ND
"" "" ""1,1,2-Trichloroethane 5.5ND
"" "" ""2-Hexanone (MBK) 8.3ND
"" "" ""Dibromochloromethane 8.6ND
" " "" "Tetrachloroethene "6.980
"" "" ""1,2-Dibromoethane (EDB) 7.8ND
"" "" ""1,1,1,2-Tetrachloroethane 7.0ND
"" "" ""Chlorobenzene 4.7ND
"" "" ""Ethylbenzene 4.4ND
"" "" ""m,p-Xylene 8.8ND
"" "" ""Styrene 4.3ND

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Project:

Project Number:

Project Manager:

Reported:

Volatile Organic Compounds by EPA TO-15
H&P Mobile Geochemistry, Inc.

Result Analyte Limit
Reporting
Units
Dilution
Batch Prepared Analyzed Method Notes Factor
VP-10-5 (E211049-15) Vapor Sampled: 16-Nov-22 Received: 16-Nov-22 EPA TO-1530-Nov-22 01-Dec-22ug/m3 EK230151o-Xylene 4.4ND "" "" ""Bromoform 10ND
"" "" ""1,1,2,2-Tetrachloroethane 7.0ND
"" "" ""4-Ethyltoluene 5.0ND
"" "" ""1,3,5-Trimethylbenzene 5.0ND
"" "" ""1,2,4-Trimethylbenzene 5.0ND
"" "" ""1,3-Dichlorobenzene 12ND
"" "" ""1,4-Dichlorobenzene 12ND
"" "" ""1,2-Dichlorobenzene 12ND
"" "" ""1,2,4-T
richlorobenzene 38ND
"" "" ""Hexachlorobutadiene 54ND
" " " "125 % 76-134Surrogate: 1,2-Dichloroethane-d4
" " " "110 % 78-125Surrogate: Toluene-d8
" " " "81.6 % 77-127Surrogate: 4-Bromofluorobenzene
VP-17-15 (E211049-16) Vapor Sampled: 16-Nov-22 Received: 16-Nov-22 EPA TO-1530-Nov-22 01-Dec-22ug/m3 EK2301511,1-Difluoroethane (LCC) 5.5ND "" "" ""Dichlorodifluoromethane (F12) 5.0ND
"" "" ""Chloromethane 2.1ND
"" "" ""Dichlorotetrafluoroethane (F114) 7.1ND
"" "" ""Vinyl chloride 2.6ND
"" "" ""Bromomethane 16ND
"" "" ""Chloroethane 8.0ND
" " "" "Trichlorofluoromethane (F11) "5.619
"" "" ""1,1-Dichloroethene 4.0ND
" " "" "1,1,2-Trichlorotrifluoroethane (F113) "7.749
"" "" ""Methylene chloride (Dichloromethane) 3.5ND
" " "" "Carbon disulfide "6.311
"" "" ""trans-1,2-Dichloroethene 8.0ND
"" "" ""1,1-Dichloroethane 4.1ND
" " "" "2-Butanone (MEK) "3039
"" "" ""cis-1,2-Dichloroethene 4.0ND
"" "" ""Chloroform 4.9ND
"" "" ""1,1,1-Trichloroethane 5.5ND
"" "" ""1,2-Dichloroethane (EDC) 4.1ND
"" "" ""Benzene 3.2ND
"" "" ""Carbon tetrachloride 6.4ND

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Project:

Project Number:

Project Manager:

Reported:

Volatile Organic Compounds by EP
A TO-15
H&P Mobile Geochemistry, Inc.

Result Analyte Limit
Reporting
Units
Dilution
Batch Prepared
Analyzed Method Notes Factor
VP-17-15 (E211049-16)
Vapor Sampled: 16-Nov-22 Received: 16-Nov-22
EK23015 30-Nov-22 01-Dec-22ug/m3 1Trichloroethene EPA TO-155.5290 "" "" ""1,2-Dichloropropane 9.4ND
"" "" ""Bromodichloromethane 6.8ND
"" "" ""cis-1,3-Dichloropropene 4.6ND
"" "" ""4-Methyl-2-pentanone (MIBK) 8.3ND
"" "" ""trans-1,3-Dichloropropene 4.6ND
" " "" "Toluene "3.86.6
"" "" ""1,1,2-Trichloroethane 5.5ND
"" "" ""2-Hexanone (MBK) 8.3ND
"" "" ""Dibromochloromethane 8.6ND
" " "" "Tetrachlor
oethene "6.9180
"" "" ""1,2-Dibromoethane (EDB) 7.8ND
"" "" ""1,1,1,2-Tetrachloroethane 7.0ND
"" "" ""Chlorobenzene 4.7ND
"" "" ""Ethylbenzene 4.4ND
"" "" ""m,p-Xylene 8.8ND
"" "" ""Styrene 4.3ND
"" "" ""o-Xylene 4.4ND
"" "" ""Bromoform 10ND
"" "" ""1,1,2,2-Tetrachloroethane 7.0ND
"" "" ""4-Ethyltoluene 5.0ND
"" "" ""1,3,5-Trimethylbenzene 5.0ND
"" "" ""1,2,4-Trimethylbenzene 5.0ND
"" "" ""1,3-Dichlorobenzene 12ND
"" "" ""1,4-Dichlorobenzene 12ND
"" "" ""1,2-Dichlorobenzene 12ND
"" "" ""1,2,4-Trichlorobenzene 38ND
"" "" ""Hexachlorobutadiene 54ND
" " " "129 % 76-134Surrogate: 1,2-Dichloroethane-d4
" " " "103 % 78-125Surrogate: Toluene-d8
" " " "81.9 % 77-127Surrogate: 4-Bromofluorobenzene

Page 42 of 102 ends

Project:

Project Number:

Project Manager:

Reported:

Volatile Organic Compounds by EPA TO-15
H&P Mobile Geochemistry, Inc.

Result Analyte Limit
Reporting
Units
Dilution
Batch Prepared Analyzed Method Notes Factor
VP-17-5 (E211049-17) Vapor Sampled: 16-Nov-22 Received: 16-Nov-22 EPA TO-1530-Nov-22 01-Dec-22ug/m3 EK2301511,1-Difluoroethane (LCC) 5.5ND "" "" ""Dichlorodifluoromethane (F12) 5.0ND
"" "" ""Chloromethane 2.1ND
"" "" ""Dichlorotetrafluoroethane (F114) 7.1ND
"" "" ""Vinyl chloride 2.6ND
"" "" ""Bromomethane 16ND
"" "" ""Chloroethane 8.0ND
" " "" "Trichlor
ofluoromethane (F11) "5.611
"" "" ""1,1-Dichloroethene 4.0ND
" " "" "1,1,2-Trichlorotrifluoroethane (F113) "7.723
"" "" ""Methylene chloride (Dichloromethane) 3.5ND
" " "" "Carbon disulfide "6.39.3
"" "" ""trans-1,2-Dichloroethene 8.0ND
"" "" ""1,1-Dichloroethane 4.1ND
"" "" ""2-Butanone (MEK) 30ND
"" "" ""cis-1,2-Dichloroethene 4.0ND
"" "" ""Chloroform 4.9ND
"" "" ""1,1,1-Trichloroethane 5.5ND
"" "" ""1,2-Dichloroethane (EDC) 4.1ND
"" "" ""Benzene 3.2ND
"" "" ""Carbon tetrachloride 6.4ND
" " "" "Trichloroethene "5.555
"" "" ""1,2-Dichloropropane 9.4ND
"" "" ""Bromodichloromethane 6.8ND
"" "" ""cis-1,3-Dichloropropene 4.6ND
"" "" ""4-Methyl-2-pentanone (MIBK) 8.3ND
"" "" ""trans-1,3-Dichloropropene 4.6ND
" " "" "Toluene "3.86.5
"" "" ""1,1,2-Trichloroethane 5.5ND
"" "" ""2-Hexanone (MBK) 8.3ND
"" "" ""Dibromochloromethane 8.6ND
" " "" "Tetrachloroethene "6.976
"" "" ""1,2-Dibromoethane (EDB) 7.8ND
"" "" ""1,1,1,2-Tetrachloroethane 7.0ND
"" "" ""Chlorobenzene 4.7ND
"" "" ""Ethylbenzene 4.4ND
"" "" ""m,p-Xylene 8.8ND
"" "" ""Styrene 4.3ND

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Project:

Project Number:

Project Manager:

Reported:

Volatile Organic Compounds by EPA TO-15
H&P Mobile Geochemistry, Inc.

Result Analyte Limit
Reporting
Units
Dilution
Batch Prepared Analyzed Method Notes Factor
VP-17-5 (E211049-17) Vapor Sampled: 16-Nov-22 Received: 16-Nov-22 EPA TO-1530-Nov-22 01-Dec-22ug/m3 EK230151o-Xylene 4.4ND "" "" ""Bromoform 10ND
"" "" ""1,1,2,2-Tetrachloroethane 7.0ND
"" "" ""4-Ethyltoluene 5.0ND
"" "" ""1,3,5-Trimethylbenzene 5.0ND
"" "" ""1,2,4-Trimethylbenzene 5.0ND
"" "" ""1,3-Dichlorobenzene 12ND
"" "" ""1,4-Dichlorobenzene 12ND
"" "" ""1,2-Dichlorobenzene 12ND
"" "" ""1,2,4-T
richlorobenzene 38ND
"" "" ""Hexachlorobutadiene 54ND
" " " "127 % 76-134Surrogate: 1,2-Dichloroethane-d4
" " " "111 % 78-125Surrogate: Toluene-d8
" " " "82.4 % 77-127Surrogate: 4-Bromofluorobenzene
VP-17-5 Rep (E211049-18) Vapor Sampled: 16-Nov-22 Received: 16-Nov-22 EPA TO-1530-Nov-22 01-Dec-22ug/m3 EK2301511,1-Difluoroethane (LCC) 5.5ND "" "" ""Dichlorodifluoromethane (F12) 5.0ND
"" "" ""Chloromethane 2.1ND
"" "" ""Dichlorotetrafluoroethane (F114) 7.1ND
"" "" ""Vinyl chloride 2.6ND
"" "" ""Bromomethane 16ND
"" "" ""Chloroethane 8.0ND
" " "" "Trichlorofluoromethane (F11) "5.619
"" "" ""1,1-Dichloroethene 4.0ND
" " "" "1,1,2-Trichlorotrifluoroethane (F113) "7.751
"" "" ""Methylene chloride (Dichloromethane) 3.5ND
" " "" "Carbon disulfide "6.312
"" "" ""trans-1,2-Dichloroethene 8.0ND
"" "" ""1,1-Dichloroethane 4.1ND
" " "" "2-Butanone (MEK) "3074
"" "" ""cis-1,2-Dichloroethene 4.0ND
"" "" ""Chloroform 4.9ND
"" "" ""1,1,1-Trichloroethane 5.5ND
"" "" ""1,2-Dichloroethane (EDC) 4.1ND
"" "" ""Benzene 3.2ND
"" "" ""Carbon tetrachloride 6.4ND

Page 44 of 102 ends

Project:

Project Number:

Project Manager:

Reported:

Volatile Organic Compounds by EP
A TO-15
H&P Mobile Geochemistry, Inc.

Result Analyte Limit
Reporting
Units
Dilution
Batch Prepared
Analyzed Method Notes Factor
VP-17-5 Rep (E211049-18)
Vapor Sampled: 16-Nov-22 Received: 16-Nov-22
EK23015 30-Nov-22 01-Dec-22ug/m3 1Trichloroethene EPA TO-155.5300 "" "" ""1,2-Dichloropropane 9.4ND
"" "" ""Bromodichloromethane 6.8ND
"" "" ""cis-1,3-Dichloropropene 4.6ND
"" "" ""4-Methyl-2-pentanone (MIBK) 8.3ND
"" "" ""trans-1,3-Dichloropropene 4.6ND
" " "" "Toluene "3.86.7
"" "" ""1,1,2-Trichloroethane 5.5ND
"" "" ""2-Hexanone (MBK) 8.3ND
"" "" ""Dibromochloromethane 8.6ND
" " "" "Tetrachlor
oethene "6.9180
"" "" ""1,2-Dibromoethane (EDB) 7.8ND
"" "" ""1,1,1,2-Tetrachloroethane 7.0ND
"" "" ""Chlorobenzene 4.7ND
"" "" ""Ethylbenzene 4.4ND
"" "" ""m,p-Xylene 8.8ND
"" "" ""Styrene 4.3ND
"" "" ""o-Xylene 4.4ND
"" "" ""Bromoform 10ND
"" "" ""1,1,2,2-Tetrachloroethane 7.0ND
"" "" ""4-Ethyltoluene 5.0ND
"" "" ""1,3,5-Trimethylbenzene 5.0ND
"" "" ""1,2,4-Trimethylbenzene 5.0ND
"" "" ""1,3-Dichlorobenzene 12ND
"" "" ""1,4-Dichlorobenzene 12ND
"" "" ""1,2-Dichlorobenzene 12ND
"" "" ""1,2,4-Trichlorobenzene 38ND
"" "" ""Hexachlorobutadiene 54ND
" " " "125 % 76-134Surrogate: 1,2-Dichloroethane-d4
" " " "101 % 78-125Surrogate: Toluene-d8
" " " "79.6 % 77-127Surrogate: 4-Bromofluorobenzene

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Project:

Project Number:

Project Manager:

Reported:

Volatile Organic Compounds by EPA TO-15
H&P Mobile Geochemistry, Inc.

Result Analyte Limit
Reporting
Units
Dilution
Batch Prepared Analyzed Method Notes Factor
VP-18-15 (E211049-19) Vapor Sampled: 16-Nov-22 Received: 16-Nov-22 EPA TO-1530-Nov-22 01-Dec-22ug/m3 EK2301511,1-Difluoroethane (LCC) 5.5ND "" "" ""Dichlorodifluoromethane (F12) 5.0ND
"" "" ""Chloromethane 2.1ND
"" "" ""Dichlorotetrafluoroethane (F114) 7.1ND
"" "" ""Vinyl chloride 2.6ND
"" "" ""Bromomethane 16ND
"" "" ""Chloroethane 8.0ND
" " "" "Trichlor
ofluoromethane (F11) "5.679
"" "" ""1,1-Dichloroethene 4.0ND
" " "" "1,1,2-Trichlorotrifluoroethane (F113) "7.743
"" "" ""Methylene chloride (Dichloromethane) 3.5ND
" " "" "Carbon disulfide "6.316
"" "" ""trans-1,2-Dichloroethene 8.0ND
"" "" ""1,1-Dichloroethane 4.1ND
" " "" "2-Butanone (MEK) "30100
"" "" ""cis-1,2-Dichloroethene 4.0ND
"" "" ""Chloroform 4.9ND
"" "" ""1,1,1-Trichloroethane 5.5ND
"" "" ""1,2-Dichloroethane (EDC) 4.1ND
"" "" ""Benzene 3.2ND
"" "" ""Carbon tetrachloride 6.4ND
" " "" "Trichloroethene "5.5110
"" "" ""1,2-Dichloropropane 9.4ND
"" "" ""Bromodichloromethane 6.8ND
"" "" ""cis-1,3-Dichloropropene 4.6ND
"" "" ""4-Methyl-2-pentanone (MIBK) 8.3ND
"" "" ""trans-1,3-Dichloropropene 4.6ND
" " "" "Toluene "3.86.6
"" "" ""1,1,2-Trichloroethane 5.5ND
"" "" ""2-Hexanone (MBK) 8.3ND
"" "" ""Dibromochloromethane 8.6ND
" " "" "Tetrachloroethene "6.9200
"" "" ""1,2-Dibromoethane (EDB) 7.8ND
"" "" ""1,1,1,2-Tetrachloroethane 7.0ND
"" "" ""Chlorobenzene 4.7ND
"" "" ""Ethylbenzene 4.4ND
"" "" ""m,p-Xylene 8.8ND
"" "" ""Styrene 4.3ND

Page 46 of 102 ends

Project:

Project Number:

Project Manager:

Reported:

Volatile Organic Compounds by EPA TO-15
H&P Mobile Geochemistry, Inc.

Result Analyte Limit
Reporting
Units
Dilution
Batch Prepared Analyzed Method Notes Factor
VP-18-15 (E211049-19) Vapor Sampled: 16-Nov-22 Received: 16-Nov-22 EPA TO-1530-Nov-22 01-Dec-22ug/m3 EK230151o-Xylene 4.4ND "" "" ""Bromoform 10ND
"" "" ""1,1,2,2-Tetrachloroethane 7.0ND
"" "" ""4-Ethyltoluene 5.0ND
"" "" ""1,3,5-Trimethylbenzene 5.0ND
"" "" ""1,2,4-Trimethylbenzene 5.0ND
"" "" ""1,3-Dichlorobenzene 12ND
"" "" ""1,4-Dichlorobenzene 12ND
"" "" ""1,2-Dichlorobenzene 12ND
"" "" ""1,2,4-T
richlorobenzene 38ND
"" "" ""Hexachlorobutadiene 54ND
" " " "127 % 76-134Surrogate: 1,2-Dichloroethane-d4
" " " "106 % 78-125Surrogate: Toluene-d8
" " " "83.3 % 77-127Surrogate: 4-Bromofluorobenzene
VP-18-5 (E211049-20) Vapor Sampled: 16-Nov-22 Received: 16-Nov-22 EPA TO-1530-Nov-22 01-Dec-22ug/m3 EK2301511,1-Difluoroethane (LCC) 5.5ND "" "" ""Dichlorodifluoromethane (F12) 5.0ND
"" "" ""Chloromethane 2.1ND
"" "" ""Dichlorotetrafluoroethane (F114) 7.1ND
"" "" ""Vinyl chloride 2.6ND
"" "" ""Bromomethane 16ND
"" "" ""Chloroethane 8.0ND
" " "" "Trichlorofluoromethane (F11) "5.641
"" "" ""1,1-Dichloroethene 4.0ND
" " "" "1,1,2-Trichlorotrifluoroethane (F113) "7.714
"" "" ""Methylene chloride (Dichloromethane) 3.5ND
"" "" ""Carbon disulfide 6.3ND
"" "" ""trans-1,2-Dichloroethene 8.0ND
"" "" ""1,1-Dichloroethane 4.1ND
"" "" ""2-Butanone (MEK) 30ND
"" "" ""cis-1,2-Dichloroethene 4.0ND
"" "" ""Chloroform 4.9ND
"" "" ""1,1,1-Trichloroethane 5.5ND
"" "" ""1,2-Dichloroethane (EDC) 4.1ND
"" "" ""Benzene 3.2ND
"" "" ""Carbon tetrachloride 6.4ND

Page 47 of 102 ends

Project:

Project Number:

Project Manager:

Reported:

Volatile Organic Compounds by EP
A TO-15
H&P Mobile Geochemistry, Inc.

Result Analyte Limit
Reporting
Units
Dilution
Batch Prepared
Analyzed Method Notes Factor
VP-18-5 (E211049-20)
Vapor Sampled: 16-Nov-22 Received: 16-Nov-22
EK23015 30-Nov-22 01-Dec-22ug/m3 1Trichloroethene EPA TO-155.57.6 "" "" ""1,2-Dichloropropane 9.4ND
"" "" ""Bromodichloromethane 6.8ND
"" "" ""cis-1,3-Dichloropropene 4.6ND
"" "" ""4-Methyl-2-pentanone (MIBK) 8.3ND
"" "" ""trans-1,3-Dichloropropene 4.6ND
" " "" "Toluene "3.84.1
"" "" ""1,1,2-Trichloroethane 5.5ND
"" "" ""2-Hexanone (MBK) 8.3ND
"" "" ""Dibromochloromethane 8.6ND
" " "" "Tetrachlor
oethene "6.949
"" "" ""1,2-Dibromoethane (EDB) 7.8ND
"" "" ""1,1,1,2-Tetrachloroethane 7.0ND
"" "" ""Chlorobenzene 4.7ND
"" "" ""Ethylbenzene 4.4ND
"" "" ""m,p-Xylene 8.8ND
"" "" ""Styrene 4.3ND
"" "" ""o-Xylene 4.4ND
"" "" ""Bromoform 10ND
"" "" ""1,1,2,2-Tetrachloroethane 7.0ND
"" "" ""4-Ethyltoluene 5.0ND
"" "" ""1,3,5-Trimethylbenzene 5.0ND
"" "" ""1,2,4-Trimethylbenzene 5.0ND
"" "" ""1,3-Dichlorobenzene 12ND
"" "" ""1,4-Dichlorobenzene 12ND
"" "" ""1,2-Dichlorobenzene 12ND
"" "" ""1,2,4-Trichlorobenzene 38ND
"" "" ""Hexachlorobutadiene 54ND
" " " "128 % 76-134Surrogate: 1,2-Dichloroethane-d4
" " " "111 % 78-125Surrogate: Toluene-d8
" " " "82.2 % 77-127Surrogate: 4-Bromofluorobenzene

Page 48 of 102 ends

Project:

Project Number:

Project Manager:

Reported:

Volatile Organic Compounds by EPA TO-15
H&P Mobile Geochemistry, Inc.

Result Analyte Limit
Reporting
Units
Dilution
Batch Prepared Analyzed Method Notes Factor
VP-19-30 (E211050-01) Vapor Sampled: 17-Nov-22 Received: 17-Nov-22 EPA TO-1506-Dec-22 06-Dec-22ug/m3 EL2061511,1-Difluoroethane (LCC) 5.5ND "" "" ""Dichlorodifluoromethane (F12) 5.0ND
"" "" ""Chloromethane 2.1ND
"" "" ""Dichlorotetrafluoroethane (F114) 7.1ND
"" "" ""Vinyl chloride 2.6ND
"" "" ""Bromomethane 16ND
"" "" ""Chloroethane 8.0ND
" " "" "Trichlor
ofluoromethane (F11) "5.664
" " "" "1,1-Dichloroethene "4.026
" " "" "1,1,2-Trichlorotrifluoroethane (F113) "7.7180
"" "" ""Methylene chloride (Dichloromethane) 3.5ND
"" "" ""Carbon disulfide 6.3ND
"" "" ""trans-1,2-Dichloroethene 8.0ND
"" "" ""1,1-Dichloroethane 4.1ND
"" "" ""2-Butanone (MEK) 30ND
"" "" ""cis-1,2-Dichloroethene 4.0ND
" " "" "Chloroform "4.97.5
"" "" ""1,1,1-Trichloroethane 5.5ND
"" "" ""1,2-Dichloroethane (EDC) 4.1ND
"" "" ""Benzene 3.2ND
"" "" ""Carbon tetrachloride 6.4ND
" " "" "Trichloroethene "5.51500
"" "" ""1,2-Dichloropropane 9.4ND
"" "" ""Bromodichloromethane 6.8ND
"" "" ""cis-1,3-Dichloropropene 4.6ND
"" "" ""4-Methyl-2-pentanone (MIBK) 8.3ND
"" "" ""trans-1,3-Dichloropropene 4.6ND
"" "" ""Toluene 3.8ND
"" "" ""1,1,2-Trichloroethane 5.5ND
"" "" ""2-Hexanone (MBK) 8.3ND
"" "" ""Dibromochloromethane 8.6ND
" " "" "Tetrachloroethene "6.9840
"" "" ""1,2-Dibromoethane (EDB) 7.8ND
"" "" ""1,1,1,2-Tetrachloroethane 7.0ND
"" "" ""Chlorobenzene 4.7ND
"" "" ""Ethylbenzene 4.4ND
"" "" ""m,p-Xylene 8.8ND
"" "" ""Styrene 4.3ND

Page 49 of 102 ends

Project:

Project Number:

Project Manager:

Reported:

Volatile Organic Compounds by EPA TO-15
H&P Mobile Geochemistry, Inc.

Result Analyte Limit
Reporting
Units
Dilution
Batch Prepared Analyzed Method Notes Factor
VP-19-30 (E211050-01) Vapor Sampled: 17-Nov-22 Received: 17-Nov-22 EPA TO-1506-Dec-22 06-Dec-22ug/m3 EL206151o-Xylene 4.4ND "" "" ""Bromoform 10ND
"" "" ""1,1,2,2-Tetrachloroethane 7.0ND
"" "" ""4-Ethyltoluene 5.0ND
"" "" ""1,3,5-Trimethylbenzene 5.0ND
"" "" ""1,2,4-Trimethylbenzene 5.0ND
"" "" ""1,3-Dichlorobenzene 12ND
"" "" ""1,4-Dichlorobenzene 12ND
"" "" ""1,2-Dichlorobenzene 12ND
"" "" ""1,2,4-T
richlorobenzene 38ND
"" "" ""Hexachlorobutadiene 54ND
" " " "97.4 % 76-134Surrogate: 1,2-Dichloroethane-d4
" " " "100 % 78-125Surrogate: Toluene-d8
" " " "99.5 % 77-127Surrogate: 4-Bromofluorobenzene
VP-19-15 (E211050-02) Vapor Sampled: 17-Nov-22 Received: 17-Nov-22 EPA TO-1506-Dec-22 06-Dec-22ug/m3 EL2061511,1-Difluoroethane (LCC) 5.5ND "" "" ""Dichlorodifluoromethane (F12) 5.0ND
"" "" ""Chloromethane 2.1ND
"" "" ""Dichlorotetrafluoroethane (F114) 7.1ND
"" "" ""Vinyl chloride 2.6ND
"" "" ""Bromomethane 16ND
"" "" ""Chloroethane 8.0ND
" " "" "Trichlorofluoromethane (F11) "5.652
"" "" ""1,1-Dichloroethene 4.0ND
" " "" "1,1,2-Trichlorotrifluoroethane (F113) "7.7100
"" "" ""Methylene chloride (Dichloromethane) 3.5ND
" " "" "Carbon disulfide "6.371
"" "" ""trans-1,2-Dichloroethene 8.0ND
"" "" ""1,1-Dichloroethane 4.1ND
"" "" ""2-Butanone (MEK) 30ND
"" "" ""cis-1,2-Dichloroethene 4.0ND
"" "" ""Chloroform 4.9ND
"" "" ""1,1,1-Trichloroethane 5.5ND
"" "" ""1,2-Dichloroethane (EDC) 4.1ND
" " "" "Benzene "3.24.9
"" "" ""Carbon tetrachloride 6.4ND

Page 50 of 102 ends

Project:

Project Number:

Project Manager:

Reported:

Volatile Organic Compounds by EP
A TO-15
H&P Mobile Geochemistry, Inc.

Result Analyte Limit
Reporting
Units
Dilution
Batch Prepared
Analyzed Method Notes Factor
VP-19-15 (E211050-02)
Vapor Sampled: 17-Nov-22 Received: 17-Nov-22
EL20615 06-Dec-22 06-Dec-22ug/m3 1Trichloroethene EPA TO-155.5380 "" "" ""1,2-Dichloropropane 9.4ND
"" "" ""Bromodichloromethane 6.8ND
"" "" ""cis-1,3-Dichloropropene 4.6ND
"" "" ""4-Methyl-2-pentanone (MIBK) 8.3ND
"" "" ""trans-1,3-Dichloropropene 4.6ND
" " "" "Toluene "3.810
"" "" ""1,1,2-Trichloroethane 5.5ND
"" "" ""2-Hexanone (MBK) 8.3ND
"" "" ""Dibromochloromethane 8.6ND
" " "" "Tetrachlor
oethene "6.9420
"" "" ""1,2-Dibromoethane (EDB) 7.8ND
"" "" ""1,1,1,2-Tetrachloroethane 7.0ND
"" "" ""Chlorobenzene 4.7ND
"" "" ""Ethylbenzene 4.4ND
"" "" ""m,p-Xylene 8.8ND
"" "" ""Styrene 4.3ND
"" "" ""o-Xylene 4.4ND
"" "" ""Bromoform 10ND
"" "" ""1,1,2,2-Tetrachloroethane 7.0ND
"" "" ""4-Ethyltoluene 5.0ND
"" "" ""1,3,5-Trimethylbenzene 5.0ND
"" "" ""1,2,4-Trimethylbenzene 5.0ND
"" "" ""1,3-Dichlorobenzene 12ND
"" "" ""1,4-Dichlorobenzene 12ND
"" "" ""1,2-Dichlorobenzene 12ND
"" "" ""1,2,4-Trichlorobenzene 38ND
"" "" ""Hexachlorobutadiene 54ND
" " " "98.2 % 76-134Surrogate: 1,2-Dichloroethane-d4
" " " "97.3 % 78-125Surrogate: Toluene-d8
" " " "100 % 77-127Surrogate: 4-Bromofluorobenzene

Page 51 of 102 ends

Riverside City CouncilJuly 14, 2026

Riverside City Council
July 14, 2026